Foldable Cart Handle Stabilizing Strut Mechanism
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Solution Overview
Problem
Existing foldable cart handles often topple left and right during storage, causing inconvenience for users.
Innovation Solution
A handle device with a connecting seat and fixing strut system that limits rotation, where the upper end of the fixing strut is connected to the cart frame and the lower end is fixedly connected to a rotating shaft, preventing the handle from tilting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the handle device is made foldable for storage convenience, then the cart can be folded for storage, but the handle may topple left and right during storage
Solution Approach 1:
The patent introduces a fixing strut that connects the connecting seat to the cart frame in a vertical dimension, transforming the handle-device stability problem from a two-dimensional平面 rotation issue into a three-dimensional spatial constraint problem. This additional vertical support dimension prevents the handle from toppling left and right while maintaining foldability.
Solution Approach 2:
The fixing strut acts as an intermediary element between the connecting seat and the cart frame. It mediates the stability issue by providing an additional support path that prevents unwanted rotation of the handle device during storage, without interfering with the normal folding operation.
2Adaptability or versatility
If the connecting seat is allowed to rotate freely for folding operation, then the cart can be folded easily, but the handle device becomes unstable and topples during storage
Solution Approach 1:
The patent creates a dynamic system where the connecting seat can rotate freely during the folding operation when needed, but becomes stabilized during storage through the fixing strut. The system transitions between mobile and fixed states based on operational requirements, achieving both adaptability and stability.
Solution Approach 2:
The handle device is segmented into functional components: the connecting seat for rotation during folding, and the fixing strut for stabilization during storage. This segmentation allows different parts to perform different functions at different times, resolving the contradiction between folding capability and storage stability.
3Stability of the object's composition
If the fixing strut is added to prevent handle toppling, then the handle stability is improved, but the device complexity increases
Solution Approach 1:
The fixing strut serves multiple functions: it prevents the handle from toppling during storage, maintains the correct angle between the handle and cart frame, and does not interfere with the folding operation. This multi-functionality justifies the additional component by providing multiple benefits from a single structural element.
Solution Approach 2:
The patent changes the structural parameters of the handle device by introducing the fixing strut, which modifies the geometric relationships and constraints. This parameter change adds stability while the design ensures the added complexity remains minimal through straightforward geometric configuration.
Data Source
AI summary
A foldable cart has a stabilizing handle device, which includes a connecting seat. The connecting seat has a connecting groove and two connecting rods of the foldable frame of the foldable cart are pivotally connected to the connecting seat in the connecting groove. A pulling rod mechanism is pivotally connected with the connecting seat. The connecting seat has a fixing strut that extends between the connecting seat and the foldable frame. When the cart frame is folded, the two connecting rods rotate about their pivot connections with the connecting seat, so that the two connecting rods approach each other. The connecting seat is fixedly connected to the fixing strut and a pivot point on the front side of the foldable frame so that an angle between the two remains fixed, which prevents the pulling rod mechanism from toppling left and right.