Replaceable Wheel Assembly for Sign Display Stand Legs
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Solution Overview
Problem
Conventional sign display stands are difficult to move without causing damage, as they require lifting or dragging, and existing wheel assemblies are not easily replaceable or convenient to install and remove, leading to wear and tear issues, especially with water-filled designs.
Innovation Solution
A replaceable wheel/foot assembly that can be clipped onto the stand without screws or bolts, featuring a cradle and structures that allow easy attachment and detachment, with wheels positioned to lift the stand off the ground for easy movement and protect the legs from wear, and a universal leg design for interchangeable sign panel sizes and formats.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the stand is made hollow for ease of carrying and filled with water to provide weight, then the stand can be easily transported and stabilized, but the legs become vulnerable to wear and leakage when dragged or worn
Solution Approach 1:
The patent divides the leg into two functional segments: the upper portion remains hollow for carrying and water-filling, while the bottom portion is protected by a separate replaceable wheel assembly or foot assembly. This segmentation allows the hollow structure to maintain its portability advantage while the vulnerable bottom portion is shielded from wear and damage.
Solution Approach 2:
The patent applies beforehand cushioning by providing a protective foot assembly or wheel assembly that is installed on the bottom of the hollow leg before use. This protective element prevents direct contact between the hollow leg and the ground, cushioning against wear, impact, and potential leakage when the stand is moved or subjected to stress.
2Ease of operation
If conventional wheel assemblies are used on stands, then movement is facilitated, but the wheels are difficult to replace and require tools and complicated procedures
Solution Approach 1:
The patent makes the wheel assembly dynamic and interchangeable by designing it as a separate, easily attachable and detachable component. The wheel assembly can be quickly replaced without tools by simply detaching the worn assembly and attaching a new one, transforming the static, permanent wheel installation into a dynamic, user-replaceable system.
Solution Approach 2:
The wheel assembly is segmented from the main stand structure, allowing it to be independently removed and replaced. The stand leg and the wheel assembly are separate components that connect through a simple interface, enabling the wheel assembly to be swapped out without affecting the integrity of the stand itself.
3Adaptability or versatility
If stands use interconnected legs with dedicated sizes and styles for different sign panels, then various panel configurations are supported, but the device complexity and cost increase
Solution Approach 1:
The patent applies universality by designing the leg assembly with a standardized interface that can accommodate different wheel assemblies and sign panel configurations. The leg itself becomes a universal component that supports various panel sizes and types through a common mounting system, eliminating the need for multiple dedicated leg designs.
Solution Approach 2:
The patent introduces dynamics by making the sign panel mounting system adjustable and reconfigurable. The panels can be easily attached and detached at different positions on the legs, allowing the same leg structure to adapt to different display requirements without requiring physical changes to the legs themselves.
Data Source
AI summary
A wheel/foot assembly for a sign display stand or other object includes a cradle partially enclosing an optional wheel. The assembly is releasably attachable to a leg for a sign display stand, protects the leg and can be easily replaced if worn. The assembly protects wear on the stand and permits the sign display stand to be wheeled, rather than dragged or carried. Because the assembly is releasably attached, it can be replaced easily if damaged or worn.