Adjustable Offset Umbrella Sliding Member Winding Mechanism
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Solution Overview
Problem
Conventional adjustable offset umbrellas require excessive winding force and are prone to line binding and wear due to complex winding paths, making operation cumbersome and reducing leisure enjoyment.
Innovation Solution
The design features a sliding member on the main pole with a locking mechanism and a simplified winding element path, separating the functions of canopy raising and angle adjustment to reduce operational effort and wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a crank mechanism with complex winding path is used for raising and lowering the canopy, then the canopy can be adjusted, but the winding force required increases and the line binds and wears easily
Solution Approach 1:
The patent separates the functions of raising/lowering the canopy and adjusting the canopy angle into two independent mechanisms: a reel mechanism for raising/lowering and a telescopic arm for angle adjustment. This segmentation eliminates the complex winding path that caused excessive winding force and line binding, directly resolving the contradiction between ease of operation and force requirements.
Solution Approach 2:
The patent extracts the angle adjustment function from the winding mechanism by introducing a separate telescopic arm that pivots relative to the main pole. This extraction removes the need for the line to follow a complex path through multiple turning points, thereby reducing winding force and preventing line binding while maintaining canopy adjustability.
2Ease of operation
If a crank mechanism with complex winding path is used for raising and lowering the canopy, then the canopy can be adjusted, but the line binds and wears easily
Solution Approach 1:
By separating the raising/lowering function (handled by the reel mechanism) from the angle adjustment function (handled by the telescopic arm), the patent eliminates the complex interaction between line winding and arm movement that caused binding and wear. This segmentation improves reliability by simplifying the line's path and reducing friction points.
3Adaptability or versatility
If the crank mechanism is mounted to the main pole with the rope moving along a complex path, then the canopy can be raised and lowered, but the operation becomes burdensome
Solution Approach 1:
The patent divides the single crank mechanism into two separate mechanisms: a reel mechanism for vertical canopy movement and a telescopic arm for angular adjustment. This segmentation eliminates the need for the user to operate a complex mechanism with multiple turning points, significantly reducing operational burden while preserving full canopy adjustability.
Solution Approach 2:
The telescopic arm is designed to pivot and extend dynamically, allowing the canopy angle to be adjusted independently of the canopy's vertical position. This dynamic design provides versatility in canopy positioning without requiring a complex fixed-path winding mechanism, thereby reducing operational burden.
4Device complexity
If the same mechanism is used for both raising/lowering and angle adjustment, then the device is simpler, but the operational effort for each function increases
Solution Approach 1:
The patent accepts increased device complexity as a trade-off to reduce operational effort by segmenting the single mechanism into two specialized mechanisms: a reel for raising/lowering and a telescopic arm for angle adjustment. Each mechanism handles one function independently, reducing the effort required for each operation despite adding a component.
Data Source
AI summary
An adjustable offset umbrella has a generally vertical main pole and a sliding member slidably mounted to the main pole. The sliding member includes a locking mechanism for securing it at a desired location along the main pole. One end of an arm is associated with the sliding member, and the other end supports an umbrella canopy. A winding mechanism is associated with the sliding member and moves with it. A line extends from the winding mechanism to the umbrella canopy. Operating the winding mechanism opens and closes the umbrella canopy, and moving the sliding member up or down the main pole adjusts the angle of the canopy with respect to the main pole.