Snap-Fit Leg Attachment Plate for Easy Caster Installation
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Solution Overview
Problem
Existing devices, such as refrigerators and cabinets, often lack built-in legs or casters and require post-manufacture installation of height-adjustable legs or casters, which can be cumbersome and complex.
Innovation Solution
A leg attachment system comprising two components: a U-shaped metal plate for securement to the device's underside, creating a gap, and a second plate with a projection for slidable mounting, featuring a barb for locking and a slot for easy installation of a caster assembly, allowing for snap-fit retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional legs or casters are installed on devices after manufacture, then the device can be supported on horizontal surfaces, but the installation process becomes cumbersome and complex
Solution Approach 1:
The leg attachment system is divided into two separate components: a first component that is permanently secured to the device underside, and a second component that can be independently installed and removed. This segmentation allows the complex attachment mechanism to be pre-assembled during manufacturing while keeping the end-user installation simple and straightforward.
Solution Approach 2:
The first component is pre-secured to the device underside during the manufacturing process, establishing the foundation for leg attachment before the product reaches the end user. This preliminary action eliminates the need for users to perform complex assembly steps, requiring only the simple insertion of the second component into the pre-prepared gap.
2Reliability
If a secure locking mechanism is used to retain the second component in the gap, then the leg assembly becomes stable, but the installation process requires more force and complexity
Solution Approach 1:
The second plate is designed with resilient properties that allow it to dynamically flex outward during installation to accommodate the barb passage, then automatically spring back to lock the component in place. This dynamic behavior provides secure retention without requiring excessive installation force, as the resilient material naturally returns to its original position after deformation.
Solution Approach 2:
The gap dimensions are specifically designed to be slightly larger than the second component, allowing for controlled material deformation during insertion. The barb is sized to engage with the second plate at a specific point during the insertion process, creating a snap-fit action that transitions the component from an unsecured to a locked state through controlled dimensional changes.
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 easy, simple, and secure installation of legs or casters on devices at any time and location, ensuring stable support on horizontal surfaces without causing material deformation or looseness.
Implementation Method 1
the second plate resiliently secured to first plate... the second plate of the first component... to define the gap therebetween... being retained in place within the gap by the barb after passage by the barb
Data Source
AI summary
The leg attachment system has first component that has two plates that define a gap for receiving a plate of a second component therebetween in a snap-fit manner. The second component has a depending projection that receives a caster assembly and the lower plate of the first component has a slot to receive the projection.