Umbrella Cable Block Relocation for Snagging Reduction
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Solution Overview
Problem
The existing combination umbrellas and gazebos face issues with snagging of cords and rings within the narrow rib cross-section, leading to asymmetric extension of side panels, allowing insects to enter and complicating repairs due to limited access and precise positioning requirements.
Innovation Solution
The design simplifies the crank mechanism by using a single cable block within the larger center pole, allowing larger, more durable cables that reduce snagging and facilitate easier repairs, with a 2:1 force transmission ratio through a solid ring or pulley, and easier access for maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If fine cords are used in narrow rib cross-section, then the structure fits within the rib, but snagging occurs and asymmetric extension results
Solution Approach 1:
The patent relocates the cable block from the narrow rib interior to the center pole, utilizing the vertical dimension and larger cross-sectional area of the center pole. This dimensional relocation allows cables to run freely without snagging on rib structures, eliminating asymmetric extension while maintaining compact rib design.
Solution Approach 2:
The patent introduces a cable block as an intermediary component within the center pole that mediates between the crank mechanism and the screen cables. This intermediary allows the cables to be routed and tensioned without direct contact with rib structures, preventing snagging and ensuring uniform cable extension.
2Ease of operation
If multiple rings and cords are used within ribs, then side panels can be attached, but repair becomes difficult due to limited access
Solution Approach 1:
The patent extracts the cable block and cable routing mechanism from the narrow rib interior and relocates it to the center pole. This extraction provides easy access to the cable block for cable replacement and repair, while the rib structures remain simple and unchanged, maintaining their attachment function.
Solution Approach 2:
The patent segments the crank mechanism into distinct functional components: the crank assembly in the center pole, the cable block for cable routing, and the rib structures for support. This segmentation allows independent access and repair of the cable block without disassembling the entire structure, significantly easing maintenance.
3Manufacturing precision
If rings are positioned precisely within ribs, then uniform extension is achieved, but positioning is difficult to replicate during repair
Solution Approach 1:
The cable block incorporates self-aligning features such as grooves or guides that automatically position the screen cables during installation. This self-service mechanism eliminates the need for precise manual positioning, ensuring uniform cable extension while simplifying the repair process.
Solution Approach 2:
The patent changes the geometric parameters of the cable block to include features like tapered guides or stepped positioning surfaces. These parameter changes create natural positioning points that guide cables into correct positions during installation, eliminating the need for complex measurement and positioning procedures.
4Volume of moving object
If narrow rib cross-section is used, then structure is compact, but cable diameter must be small reducing durability
Solution Approach 1:
The patent relocates the cable routing from the narrow horizontal cross-section of the ribs to the vertical cross-section of the center pole. This dimensional change allows the use of larger diameter cables with greater strength and durability, while the overall structure remains compact due to the centralized pole configuration.
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
This solution reduces snagging, enhances the durability of cables, simplifies the repair process, and ensures uniform extension and retraction of side panels, providing better insect protection and usability.
Implementation Method 1
The term 'cable block' includes a solid ring, a pulley, or similar structure through which the force of the crank cable is transmitted to the screen cables in substantially a 2:1 ratio.
Data Source
AI summary
An improved combination umbrella and gazebo is provided which protects the user from adverse weather and insects.