Seat Folding Cart Frame Locking for Easy Fold and Stable Load Support
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Solution Overview
Problem
Existing folding carts are laborious to fold, lack structural support for high strength and weight, and can unintentionally fold due to external forces, causing inconvenience in use.
Innovation Solution
A seat folding cart design featuring a rotatable connection between the front and rear frame bottoms, telescoping frame, and a removable cloth pocket, with a fixing bar and limiting pillars to facilitate easy unfolding and folding, and a backrest for seating conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If force is applied to each side face from the outside to make them approach the load-bearing part, then the cart can be folded, but the folding process becomes laborious and inconvenient
Solution Approach 1:
The cart body is divided into multiple hinged sections (front frame bottom, rear frame bottom, side faces) that can be folded independently. The hinged connection allows each segment to rotate relative to others, enabling the cart to be folded by simply moving one section rather than applying force to all sides simultaneously.
Solution Approach 2:
The cart employs dynamic hinged connections that allow the structure to transition between folded and unfolded states through rotation. The hinged ends at the side faces enable the cart body to dynamically adjust its configuration, making folding a simple rotational motion rather than a complex force-application process.
2Strength
If the cart body frame consists of four side faces without connecting support bars, then the structure is simpler, but it cannot support high strength and weight
Solution Approach 1:
The connecting support bars are integrated into the existing side face structure, merging the support function with the structural elements already present. The hinged connections and support bars work together as a unified system that provides strength without requiring entirely separate support components.
Solution Approach 2:
The connecting support bars are pre-installed on the side faces during manufacturing, so that when the cart is assembled, the structural support is already in place. This preliminary preparation ensures that the cart can bear heavy loads from the outset without requiring additional assembly steps.
3Ease of operation
If no fixing structure is provided in the folding cart, then the structure is simpler, but the cart folds on its own when subjected to external force during unfolding
Solution Approach 1:
The fixing structures (such as locks or latches) are designed to counteract the natural tendency of the cart to fold under external force. These structures apply a preliminary counteracting force or mechanical constraint that prevents the cart from collapsing during the unfolding process, ensuring stable operation.
Solution Approach 2:
The fixing structures act as intermediary elements between the cart body and the external environment. These intermediaries (locks, latches, or mechanical stops) mediate the interaction between the cart and external forces, preventing unwanted folding while allowing controlled unfolding when needed.
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 folding and unfolding of the cart, supports heavy loads, and allows quick conversion into a seat, enhancing usability and convenience.
Implementation Method 1
the front frame bottom and the rear frame bottom being rotatably connected by means of connecting plates
Data Source
AI summary
The present invention relates to the technical field of folding carts, and in particular to a seat folding cart comprising: a front frame bottom, a rear frame bottom, a front retaining frame, a rear retaining frame, and a telescoping frame, the front frame bottom and the rear frame bottom being rotatably connected by means of connecting plates. Outer ends of the front frame bottom and the rear frame bottom at two sides thereof are stretched outwardly until inner ends of the front frame bottom and the rear frame bottom are pressed against limiting pillars, thus serving to allow the cart body to be easily folded and unfolded. When the cart body is unfolded, goods are placed on the cart body, which can then be pulled to move carrying the goods.