Vehicle Trim Clip Attachment With Low Insertion, High Retention
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Solution Overview
Problem
The existing attachment methods for plastic trim components in vehicle door assemblies, such as heat stakes and screws, require complex and powered machines, which is undesirable for simplification and efficiency.
Innovation Solution
A clip system with a base and tip portion, featuring flexible opening tabs and side openings, allowing for secure attachment of trim pieces with low insertion force and high retention force, eliminating the need for powered machines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If heat stakes or screws are used to attach trim pieces, then the attachment strength is improved, but the device complexity and need for powered machines increases
Solution Approach 1:
The clip is designed to be self-installing without requiring external powered machines. The flexible opening tabs automatically engage with the trim piece opening, and the retaining features lock the clip in place through simple manual insertion and rotation, eliminating the need for heat stakes, screws, or powered fastening equipment.
Solution Approach 2:
The patent replaces complex mechanical fastening systems (heat stakes requiring weld machines, screws requiring torque machines) with a simple mechanical clip system that uses elastic deformation of flexible tabs and geometric interlocking of retaining features, achievable with basic manual tools or even hand installation.
2Reliability
If heat stakes or screws are used for attachment, then the reliability of attachment is improved, but the ease of operation deteriorates
Solution Approach 1:
The clip automatically secures itself to the trim piece through the interaction of its retaining features with the opening tabs. Once inserted, the flexible opening tabs deform and lock into position, and the retaining features engage to prevent removal, creating a reliable attachment that is as easy to install as simple manual insertion and rotation.
3Strength
If traditional attachment methods are used, then the retention strength is improved, but the insertion force required increases
Solution Approach 1:
The flexible opening tabs are designed with specific material properties and geometric dimensions that allow them to deform elastically under low insertion force. The tabs bend to accommodate the clip during installation, then spring back to engage the retaining features, providing strong retention (50 pounds force or greater) after installation with minimal insertion force (10 pounds force or less).
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
Enables secure attachment of trim pieces with reduced manual force and increased efficiency, providing a reliable and power-free assembly solution for vehicle trim components.
Implementation Method 1
the plurality of opening tabs are flexible to reduce an insertion force of the clip into the clip opening
Data Source
AI summary
A trim assembly of a vehicle includes a first trim piece, a second trim piece, and a clip extending from the first trim piece. The clip has a base portion located at the first trim piece and a tip portion. A clip opening is located at the second trim piece. The clip opening has a complimentary shape into which the clip is installed. The clip opening includes a plurality of opening tabs, each opening tab of the plurality of opening tabs is engaged with a retention feature of the clip to retain the clip in the clip opening.