Expandable Shopping Cart Platform for Heavy Load Support
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Solution Overview
Problem
Shopping carts often struggle to securely carry heavy and bulky items, as they typically have limited space and can damage smaller items when bulky items are placed on top of them.
Innovation Solution
A foldable, expandable rectangular platform with pivotally attached side panels that can be extended to cover the cart basket, secured with spring-loaded hinges and clamps, allowing it to support heavy items and fold within the basket when not in use, made of lightweight, rigid materials like plastic-covered wire mesh.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rigid platform is used to support heavy items, then load-bearing capacity is improved, but the platform cannot be stored within the cart basket when not in use
Solution Approach 1:
The platform employs pivotally attached side panels that can rotate between an extended position for load-bearing and a retracted position for storage. Spring-loaded hinges provide automatic extension force, while latch mechanisms enable locked positioning. This dynamic structure allows the platform to adapt its configuration based on whether it is being used to carry heavy items or stored within the cart basket.
Solution Approach 2:
When not in use, the side panels are folded inward and nested against the central panel, allowing the entire platform structure to be compacted to fit within the confines of the cart basket. The panels are dimensioned and configured so that when folded, the assembly occupies minimal space while maintaining structural integrity for future deployment.
2Strength
If the platform is made of rigid material to support heavy items, then strength is improved, but the weight of the platform increases
Solution Approach 1:
The platform panels are constructed from composite materials combining rigid plastic covering with a wire mesh or truss framework. This composite structure provides the necessary load-bearing capacity to support heavy items (rated for up to 50 pounds) while the open mesh design and truss configuration significantly reduce the overall weight and material usage compared to a solid rigid panel.
Solution Approach 2:
The platform structure uses localized reinforcement only where needed for strength. The wire mesh or truss framework concentrates structural support at key load-bearing points and panels, rather than requiring uniform thickness and material density throughout the entire platform. This allows the structure to be strong where required while remaining lightweight in other areas.
3Area of moving object
If the side panels are extended to cover the cart basket, then load-bearing area is improved, but the platform cannot be stowed within the cart basket
Solution Approach 1:
The side panels are designed with pivotal connections that allow them to rotate between an extended horizontal position for maximum load-bearing area and a folded vertical position for compact storage. Spring-loaded hinges automatically push the panels into the extended position when deployed, while latch mechanisms secure them in place during use. When stowing, the panels are manually folded inward and locked in the compact configuration.
Solution Approach 2:
The platform is divided into a central panel and two separate side panels that can be independently positioned. This segmentation allows the side panels to be extended outward to increase the load-bearing area when needed, or folded inward against the central panel for storage. The modular panel design enables flexible configuration changes without compromising the structural integrity of the entire platform.
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 platform effectively supports up to 50 pounds without bending, providing a secure load-bearing surface for heavy items while allowing the entire assembly to be stowed within the cart basket when not in use, enhancing the cart's carrying capacity and protecting smaller items.
Implementation Method 1
the panel hinges connecting the side panels to the central panel are spring-loaded and lockable, as illustrated in FIGS. 6A and 6B, so that the hinge springs are under tension when the platform is folded up, and when released the hinge springs extend the side panels
Implementation Method 2
slidably enclose a stud extending from and supporting a spring-loaded clamp (best seen in FIG. 7), by which the platform can be secured to the top of the cart basket
Data Source
AI summary
An expandable rectangular platform, comprises a central panel to which two side panels are pivotally attached on either side by at least one pair of panel hinges. The platform can be expanded, with the side panels extended, so as to extend over the sides of the cart basket, in which extended configuration it can serve a load-bearing function. When the platform is not in use, the side panels are pivoted under the central panel, and their lengthwise sides are secured together by one or more panel connectors.