Snap-in Fastener with Angled Legs for Vehicle Assembly
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Solution Overview
Problem
Existing snap-in fasteners require excessive force to install and may not provide a secure attachment of vehicle components to structural portions, such as roofs, which can lead to instability and increased assembly time.
Innovation Solution
A snap-in fastener design featuring a base with alternating first and second legs extending downwardly and outwardly, where the first leg applies a force in one direction and the second leg applies a force in an opposite direction, utilizing a resilient material and angled configurations to reduce installation force and enhance retention, with a foot having an inwardly extending profile for secure engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a conventional snap-in fastener is used, then the vehicle component can be secured to the vehicle structure, but excessive force is required for installation
Solution Approach 1:
The fastener incorporates a resilient base that dynamically flexes during installation to reduce insertion force, then maintains static engagement once installed. The base's ability to transition from a flexible installation state to a rigid retention state resolves the contradiction between requiring low installation force and providing secure attachment.
Solution Approach 2:
The fastener changes its mechanical parameters (flexibility, engagement force) based on the installation phase. During insertion, the resilient base exhibits high flexibility to accommodate positioning; once engaged, it transitions to a rigid state providing strong retention, thereby reducing installation force requirements while maintaining secure attachment.
2Reliability
If a conventional snap-in fastener is used, then the vehicle component can be attached, but the attachment may not be secure leading to instability
Solution Approach 1:
The resilient base provides dynamic adaptation to the vehicle structure during installation, ensuring proper engagement. Once installed, the base's elasticity provides continuous force maintenance, preventing loosening and enhancing both attachment security and retention strength simultaneously.
Solution Approach 2:
The resilient base acts as a counterbalancing element that compensates for installation variations and structural tolerances. By providing continuous elastic force opposite to any loosening tendency, it enhances both the security and strength of the attachment.
3Productivity
If a conventional snap-in fastener is used, then the fastening function is provided, but assembly time increases
Solution Approach 1:
The resilient base enables rapid installation by dynamically absorbing positioning errors and requiring minimal insertion force. This dynamic compliance eliminates the need for precise alignment and forceful insertion, significantly reducing assembly time while maintaining fastening functionality.
Solution Approach 2:
The resilient base is pre-configured to flex during installation, anticipating positioning variations before they become problems. This preliminary compliance action prevents installation delays by accommodating tolerances proactively, thereby increasing productivity without sacrificing attachment quality.
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 reduces the force needed for installation and enhances the secure attachment of vehicle components by distributing the force effectively, ensuring a stable and reliable snap-fit mechanism.
Implementation Method 1
The fastener may be formed of a resilient material
Data Source
AI summary
A snap-in fastener is provided for securing a vehicle component to a vehicle structure. The fastener comprises a base having a longitudinal axis, a first leg extending downwardly and outwardly from the base and configured to apply a force to the vehicle structure in a first direction, and a second leg extending downwardly from the base and configured to apply a force to the vehicle structure in a second direction that is substantially opposite the first direction. The first leg may have a first portion extending from the base at a first angle relative to the longitudinal axis and a second portion extending from the first portion at a second angle relative to the longitudinal axis that is different than the first angle. The first leg may also have a foot having a contact surface with an inwardly extending profile for engaging an edge of the vehicle structure.