Wind-Resistant Umbrella Frame with Dual Canopy and Return Wires
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Solution Overview
Problem
Conventional umbrellas are prone to being turned inside out by strong winds, leading to damage and inconvenience in restoring the original configuration, and existing wind-resistant designs suffer from canopy slackening and unsmooth closure.
Innovation Solution
A wind-resistant umbrella frame structure featuring a dual-canopy arrangement with a primary and secondary frame, including internal and external ribs, return wires, and a traction rib assembly, which provides stable support and airflow passage to prevent inside-out scenarios and ensure smooth operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dual-layer canopy structure is used to resist wind, then wind resistance is improved, but canopy slackening and unsmooth closure occur
Solution Approach 1:
The patent applies dynamics by making the umbrella ribs movable and adjustable through pivot joints. The multi-section ribs can dynamically adapt their configuration in response to wind forces, allowing the canopy to maintain its shape and function properly during closure even in windy conditions. The runner mechanism enables dynamic adjustment of the rib sections to prevent slackening while ensuring smooth operation.
2Volume of moving object
If multi-folded umbrella ribs with multiple pivot joints are used, then compactness is improved, but vulnerability to wind damage increases
Solution Approach 1:
The patent applies preliminary action by equipping the pivot joints with return wires and springs that are pre-configured to automatically restore the rib sections to their proper configuration. The return wires are tensioned in advance to pull the ribs back into position if wind forces cause displacement, and the springs are pre-loaded to provide restoring force, preventing damage before it occurs.
3Stability of the object's composition
If return wires and springs are added to prevent canopy slackening, then structural stability is improved, but device complexity increases
Solution Approach 1:
The patent applies merging by integrating the return wires and springs directly into the existing rib structure and pivot joints. Rather than adding separate, independent stabilization systems, the return wires are incorporated as part of the rib assembly, and the springs are mounted within the existing joint mechanisms. This consolidation maintains structural stability while minimizing additional complexity.
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 design effectively prevents the umbrella from being turned inside out by strong winds, maintains canopy stability, and ensures smooth operation and extended service life by allowing airflow passage and simplified structure.
Implementation Method 1
an auxiliary opening force is provided by a collapse spring
Implementation Method 2
The secondary frame has an end pivotally connected to a runner that is slidable up and down along an umbrella post
Data Source
AI summary
A wind-resistant umbrella frame structure is applicable to an arrangement of dual canopies and includes a primary frame and a secondary frame. The primary frame has an inner end pivotally connected to a crown and an outer end connected to the annular lower canopy. The secondary frame is pivotally connected to the runner and has an opposite end pivotally connected to the primary frame. The primary frame includes an internal rib, an intermediate rib, an external rib, and a traction rib assembly, and also includes an intermediate rib return wire, an external rib return wire, and a collapse spring. The umbrella frame structure allows air flows to be readily conducted out and ensures the service life of the canopies.