Segmented Sunshade Umbrella Canopy Ribs for Compact Folding

The umbrella rib is divided into multiple segments (first rib section, second rib section, third rib section) that can rotate relative to each other. This segmentation allows the rib to be folded into a compact configuration while maintaining the ability to support a large canopy when extended, directly resolving the contradiction between large shaded area and compact folded length

The patent introduces rotatable connections between rib sections with adjustable rotation angles (α, β, γ). These dynamic joints allow the rib structure to transform between extended and folded states, enabling the canopy to provide sufficient shaded space when open while reducing to a compact form for storage and transportation

The segmented rib structure allows the rib sections to nest within each other when folded, similar to nested dolls. The first, second, and third rib sections can be positioned concentrically during folding, dramatically reducing the packaging volume required while still supporting a large canopy area when deployed

The patent transforms the rib structure from a linear one-dimensional extension into a multi-dimensional folded configuration. By introducing rotation joints that operate in multiple angular dimensions (α, β, γ), the long ribs can be collapsed into a compact three-dimensional form factor suitable for standard packaging and transportation

The rib is divided into three main sections with rotatable connections, creating a modular structure. Each section can be independently positioned and locked, simplifying the control mechanism compared to a fully continuous flexible rib. The segmentation allows for straightforward folding geometry while maintaining structural integrity

The patent controls the complexity through defined rotation angle parameters (α, β, γ) for each joint. By specifying particular angular ranges and locking positions, the system transforms a potentially complex continuous mechanism into a discrete, parameter-controlled system with predictable behavior, easing manufacturing and operation