Access Panel Mounting Tabs for Fastener-Free Ceiling Openings
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Solution Overview
Problem
Existing ventilation fan mounting systems fail to positively engage a trim ring with a ceiling opening without the use of a cover attached to the ventilation fan housing.
Innovation Solution
A frame assembly with bendable mounting tabs that can be press-fit into a structural opening and secured with bayonets, allowing attachment without traditional fasteners, and a cover that snaps into place with prongs to hold the assembly securely.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional fasteners (screws, nails) are used to attach the access cover to the structural opening, then the attachment strength and reliability are improved, but the ease of installation and removal deteriorates
Solution Approach 1:
The mounting member is divided into distinct functional segments: a first end with a bayonet engagement feature that inserts into the structural opening, and a second end that bends at least 90 degrees to engage with the frame. This segmentation allows each part to perform its specific function independently, enabling secure attachment without traditional fasteners while maintaining ease of installation through a simple insert-and-bend operation.
Solution Approach 2:
The mounting member incorporates a bendable section that can dynamically change shape during installation. The second end bends at least 90 degrees from a first position to a second position, transforming from a linear configuration to a perpendicular engagement position. This dynamic bending action creates a mechanical lock that secures the access cover to the frame without requiring screws or nails, while the reversible nature of the bend allows for easy removal.
2Shape
If a cover is attached to the ventilation fan housing to conceal the opening, then the aesthetic appearance is improved, but the device complexity increases
Solution Approach 1:
The access cover assembly merges multiple functions into a single integrated component. The frame provides both the structural support and the aesthetic enclosure, while the mounting member simultaneously achieves attachment to the structural opening and engagement with the frame. The bayonet feature and bendable section are combined into one piece that performs both mounting and securing functions, eliminating the need for separate covers attached to ventilation fan housing and reducing overall device complexity.
3Ease of operation
If bendable mounting tabs are used to attach the access cover without fasteners, then the ease of installation is improved, but the manufacturing precision requirements worsen
Solution Approach 1:
The mounting member utilizes controlled material flexibility and geometric parameters to achieve easy installation. The bendable material property allows the second end to flex at least 90 degrees during installation and remain in position during use. The bayonet feature's dimensional parameters are designed to engage precisely with the structural opening, while the overall geometry allows for tolerance variations that facilitate easy installation without compromising the secure attachment achieved through the bend-and-lock mechanism.
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
Provides secure attachment of an access cover to structural openings without screws or nails, enabling easy installation and removal.
Implementation Method 1
each mounting member formed of a bendable material that enables a second end of the mounting member to bend at least 90 degrees to a bent shape and to retain the bent shape
Implementation Method 2
each mounting member of the at least two mounting members has a bayonet formed on the first end to retain the at least two mounting members in engagement with the orifice in the frame
Implementation Method 3
each mounting member of the at least two mounting members is press fit into the respective orifice in the frame
Data Source
AI summary
An assembly for covering an opening in a structural member, the assembly having a frame with at least two orifices formed in the frame, a cover structured for attachment to the frame, and at least two mounting members capable of being attached to the frame, each mounting member having a first end structured to be received in a respective orifice in the frame, each mounting member formed of a bendable material that enables a second end of the mounting member to bend at least 90 degrees to a bent shape and to retain the bent shape to enable attachment of the assembly to the structural member without the use of typical fasteners.