Folding Shopping Cart Telescopic Frame Mechanism
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Solution Overview
Problem
Existing shopping carts lack the ability to fold, making storage and transportation inconvenient due to their large size.
Innovation Solution
A folding shopping cart design featuring a telescopic vertical frame member with a telescopic locking device and folding linkage mechanism, allowing the cart to be easily converted between a use orientation and a storage orientation using a button-activated mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the shopping cart uses a fixed frame structure, then it provides stability and strength for carrying groceries, but it occupies large storage space and is inconvenient for transportation
Solution Approach 1:
The shopping cart frame is designed with dynamic telescopic and folding capabilities. The vertical frame member can telescope to adjust height and fold to reduce volume. The linkage mechanism allows the rear wheels to fold inward, transforming the cart from a stable extended state to a compact folded state for storage and transportation
Solution Approach 2:
The frame is divided into separable components including the telescopic vertical frame member, linkage mechanism, and folding rear wheels. These segmented parts can be independently moved and positioned, allowing the cart to transition between extended and folded configurations while maintaining structural integrity
2Ease of operation
If the shopping cart is designed to fold, then it reduces storage space and improves portability, but it increases device complexity with additional locking mechanisms
Solution Approach 1:
Multiple functions are merged into integrated components. The telescopic locking device combines telescopic movement with locking capability in a single mechanism. The linkage mechanism integrates wheel folding with frame collapsing functions. This merging reduces the number of separate components and simplifies the overall operation
Solution Approach 2:
The locking mechanisms are designed to automatically engage and disengage during the folding and unfolding process. The telescopic locking device and linkage mechanism work together self-activatingly when the user applies force to fold or unfold the cart, reducing the need for manual manipulation of separate locking components
Data Source
AI summary
A folding shopping cart includes a body frame with a frame connecting base secured at the first end of the body frame. The shopping cart also includes a lower first frame member and an upper second frame member telescopically engaged to define a vertical frame member, wherein a bottom of the lower first frame member is hinged on the frame connecting base. A handlebar is connected with the upper second frame member and front wheels are secured to a second end of the body frame opposite the first end of the body frame. First and second folding rear wheels are respectively secured on opposite sides of the frame connecting base. A button is mechanically linked to a telescopic locking device controlling relative movement between the lower first frame member and the upper second frame member. At least one basket is detachably secured thereto.