Door Fastener Retaining Assembly for Flush Sealing
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Solution Overview
Problem
Existing door fastener retaining systems cannot maintain door fastening hardware flush against the mounting surface when closed, which is necessary for protection against internal arc faults and leak prevention.
Innovation Solution
A door fastener retaining assembly comprising a bracket and a retainer washer, where the retainer washer is disposed around the fastener and between the bracket and the door, allowing the fastener to extend through the bracket and door while retaining it in place, enabling the door to close flush against the mounting surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a door fastener retaining system is used to retain fastening hardware on the door, then the fastener is retained to the door while open, but the door cannot close completely flush against the mounting surface
Solution Approach 1:
The retaining system is divided into two separate functional components: a bracket that attaches to the mounting surface and a retainer washer that attaches to the door. This segmentation allows each component to perform its specific function without interfering with the other, enabling the door to close flush while still retaining the fastener.
Solution Approach 2:
The retainer washer acts as an intermediary element between the fastener and the door, providing a retaining function while being thin enough to allow the door to close flush against the mounting surface. The bracket serves as an intermediary between the fastener and the mounting surface, distributing the retention force without preventing door contact.
2Object-affected harmful factors
If the door closes flush against the mounting surface for arc fault protection, then protection is provided, but the fastener cannot be retained on the door when open
Solution Approach 1:
By separating the retention function into a two-part system (bracket and retainer washer), the door surface can maintain full contact with the mounting surface for arc fault protection, while the distributed retention components keep the fastener securely attached when the door is open.
Solution Approach 2:
The retainer washer serves as a thin intermediary component that provides fastener retention without creating a gap between the door and mounting surface, thus maintaining arc fault protection while enabling fastener retention.
3Reliability
If a retainer washer is placed between the bracket and door for fastener retention, then the fastener is retained, but the door cannot sit flush against the mounting surface
Solution Approach 1:
The retainer washer is designed with specific dimensional parameters (thickness, inner diameter, outer diameter) that allow it to provide adequate fastener retention while maintaining a thin profile that permits the door to close flush against the mounting surface.
Data Source
AI summary
A system including a door, a fastener, and a fastener retaining assembly is provided. The fastener is extending at least partially through an aperture in the door. The fastener retaining assembly includes a bracket and a retainer washer. The fastener retaining assembly is attached to the door and retains the fastener to the door. The retainer washer is disposed around the fastener and disposed between the bracket and the door.