Push-In Retainer Seal Hinge for Zero-Gap Panel Sealing
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Solution Overview
Problem
Existing push-in type retainers with sealing features often experience a build-up or stack-up condition that reduces the clamp load force, leading to gaps between the surface and support structures, allowing noise, moisture, and dust to penetrate, and complicating installation due to separate seal components.
Innovation Solution
A connection assembly with a push-in retainer featuring a flexible sealing foot that flexes about a living hinge, maintaining continuous sliding contact with the support panel without blocking the retainer's designed orientation, ensuring a 'zero gap' condition and integrated sealing without separate components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate seal component is used with push-in retainers, then sealing function is provided, but device complexity increases and installation is complicated
Solution Approach 1:
The seal is integrated directly into the retainer body as a unitary structure, combining the sealing function with the fastening function. The retainer includes a head portion with an integrated seal that forms a continuous barrier against moisture and noise without requiring separate seal components.
2Reliability
If seal material is placed between the retainer and support panel, then sealing is achieved, but clamp load force is reduced due to stack-up condition
Solution Approach 1:
The seal is positioned in a radial dimension extending outward from the retainer head rather than being compressed axially between the retainer and panel. The seal material forms a radial barrier that contacts the panel surface perpendicular to the clamp load direction, eliminating the stack-up effect while maintaining sealing effectiveness.
3Ease of operation
If deflectable wing elements are compressed radially inwardly during insertion, then retainer insertion is achieved, but sealing contact may be compromised
Solution Approach 1:
The seal is designed with flexible material properties that allow it to deform dynamically during the insertion process. As the deflectable wing elements compress radially inwardly, the seal material flexes and redistributes to maintain continuous contact with the panel surface, ensuring sealing is preserved throughout the insertion and locking sequence.
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 solution effectively maintains a 'zero gap' condition between the surface and support structures, preventing noise and moisture intrusion while simplifying installation by eliminating the need for separate seals and avoiding stack-up issues.
Implementation Method 1
a flexible sealing foot that flexes about a living hinge, maintaining continuous sliding contact with the support panel
Data Source
AI summary
A press-in retainer includes a retainer head having a collar and a seal disposed at least partially about the collar. A clip portion projects from the collar. The seal includes a main body engaging the collar and a sealing foot disposed entirely outboard from the collar. The sealing foot is configured to hinge about an intersection of the sealing foot and body portion while remaining entirely outboard from the main body. In a substantially flattened condition of the sealing foot, an angle between the sealing foot and a distal surface of the main body approaches a flat contiguous surface.