Snap-Fit Refrigerator Shelf Frame for Removable Glass Retention
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Solution Overview
Problem
Conventional glass shelves for refrigerators are costly and complex due to the use of over-molded or adhesive-based plastic frames, which increase manufacturing complexity and costs.
Innovation Solution
A shelf assembly with a frame that removably retains the glass panel using internal support channels around all four sides, manufactured from injection-molded plastic, allowing for snap-fit installation and easy removal without adhesives or mechanical fasteners, featuring elastic deformation for rear edge insertion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If over-molded or adhesive-based plastic frames are used to retain glass shelves, then the glass panel is securely retained, but manufacturing complexity and costs increase
Solution Approach 1:
The frame is divided into multiple support channels (front, rear, and side support channels) that are integrally formed within the plastic frame structure. Each channel is positioned to receive and support a specific edge of the glass panel, distributing the retention function across multiple segmented support points rather than a single complex mechanism.
Solution Approach 2:
The patent combines multiple support functions into a single integrally molded plastic frame structure. The front member, rear member, and side members are merged into one unified component that provides front support channel, rear support channel, and side support channels simultaneously, eliminating the need for separate retention mechanisms.
2Reliability
If conventional adhesive-based frames are used, then the glass panel is securely attached, but assembly and disassembly become difficult
Solution Approach 1:
The patent replaces adhesive-based mechanical attachment with a purely mechanical snap-fit retention system. The glass panel is retained through the elastic deformation and resilient engagement of the support channels with the glass edges, eliminating the need for adhesives and enabling tool-free assembly and disassembly.
Solution Approach 2:
The rear member is designed to be elastically deformable, allowing it to temporarily deflect upward during assembly to enable insertion of the glass panel's rear edge into the rear support channel. After insertion, the rear member returns to its original position, providing secure retention. This dynamic flexibility enables easy assembly and disassembly while maintaining secure attachment during use.
3Stability of the object's composition
If the rear member is made rigid for structural stability, then the frame maintains its shape, but the glass panel cannot be easily inserted or removed
Solution Approach 1:
The rear member is designed with dynamic properties, being elastically deformable to temporarily deflect upward during assembly or disassembly operations. This allows the glass panel to be inserted or removed by applying force to deflect the rear member, creating clearance between the rear support channel and the glass rear edge. Once the operation is complete, the rear member returns to its stable position, maintaining structural integrity.
Solution Approach 2:
The patent changes the physical state or properties of the rear member by making it elastically deformable rather than completely rigid. This parameter change allows the rear member to temporarily alter its position and shape during assembly/disassembly operations while maintaining structural stability during normal use, resolving the contradiction between rigidity and operability.
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 provides a cost-effective, simplified assembly and disassembly process for glass shelves, reducing manufacturing complexity and enabling secure retention of the glass panel against gravity, facilitating easy cleaning and replacement.
Implementation Method 1
The rear member is elastically deformable and the shelf panel is selectively insertable or removable from the rear support channel by temporarily deflecting the rear member upwards relative to the horizontal plane a sufficient amount to separate the rear edge of the shelf panel from the rear support channel
Data Source
AI summary
A shelf assembly for an appliance comprises a shelf panel with a planar support surface and a frame to support the shelf panel with the support surface extending generally along a horizontal plane. The frame comprises a front support channel, opposed side support channels, and a rear support channel. The rear support channel is adapted to support the shelf panel against the force of gravity and to inhibit removal of the shelf panel from the frame in the direction of the horizontal plane. The shelf panel is selectively insertable into or removable from the rear support channel by temporarily deflecting the rear support channel relative to the horizontal plane a sufficient amount to separate the rear support channel from a rear edge of the shelf panel.