Sunshade Canopy Rotation Sleeve Assembly to Prevent Clutch Sticking
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Solution Overview
Problem
Existing sunshade rotation devices have complex structures, are difficult to assemble, and often experience clutch mechanism failures due to slight deformations, leading to inconvenient operation.
Innovation Solution
A simplified rotation device design featuring a rotary handle sleeve, lower clutch sleeve, and rotary shaft with guide ribs and grooves, clutch gears, and a reset spring, allowing for smooth disengagement and easy assembly, reducing parts and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional clutch mechanism is used in the rotary knob, then the sunshade canopy can be rotated and adjusted, but the structure becomes complicated and the clutch mechanism gets stuck due to slight deformation
Solution Approach 1:
The patent extracts and eliminates the traditional clutch mechanism from the rotary knob assembly. Instead of using a complex clutch mechanism with multiple components, the invention uses a simplified direct connection structure where the rotary knob is directly connected to the adjusting mechanism without intermediate clutch elements, thereby reducing structural complexity while maintaining the rotation adjustment function
Solution Approach 2:
The patent inverts the traditional design approach by making the rotary knob and connecting components removable and replaceable rather than fixed and integrated. This allows the simple rotary knob assembly to be detached and replaced if deformation occurs, preventing the sticking issue while keeping the overall structure simple
2Ease of manufacture
If a traditional clutch mechanism with multiple parts is used, then the rotation function is achieved, but the assembly process becomes difficult and time-consuming
Solution Approach 1:
The patent segments the rotary knob assembly into separate, modular components that can be independently manufactured and assembled. The rotary knob, connecting shaft, and mounting components are designed as discrete units with standardized interfaces, allowing for easy assembly and disassembly without requiring complex alignment or multiple fastening steps
Solution Approach 2:
The patent combines multiple functions into the simplified rotary knob assembly by integrating the rotation control, position adjustment, and locking functions into a single unified structure, eliminating the need for separate clutch mechanisms and reducing the number of parts that need to be assembled
3Ease of operation
If a complex rotating device with multiple components is used, then the canopy rotation is achieved, but the cost of manufacturing increases
Solution Approach 1:
The patent extracts and removes unnecessary intermediate components such as clutch mechanisms, bearing seats, and shaft sleeves from the traditional design. The simplified structure uses only the essential elements needed for rotation adjustment, significantly reducing the quantity of parts while maintaining full functionality
Solution Approach 2:
The patent designs the rotary knob assembly to perform multiple functions simultaneously - rotation control, position indication, and adjustment locking - using a single integrated structure rather than separate specialized components, thereby reducing the total number of parts needed
Data Source
AI summary
A device to adjust the angle of rotation of a canopy of a sunshade comprises an upper clutch sleeve sleeved at a lower end of an upper tube of the sunshade, a lower clutch sleeve sleeved at an upper end of a lower tube, a rotary handle sleeve and a rotary shaft sleeved outside the upper tube and the lower tube, a rotary shaft rotationally inserted within one of the upper tube and the lower tube and fixedly connected with the other, a retaining ring disposed between the upper end of the rotary handle sleeve and the upper tube and elastically connected with the upper clutch sleeve or the upper tube, and a set of fitting parts.