Sunshade Auto Bending Structure with Sliding Rod and Return Spring
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Solution Overview
Problem
Traditional sunshade bending structures face issues with achieving the proper bending angle due to load constraints, resulting in excessive bending and difficulty with scarf joints, and are characterized by complex structures, high production costs, and lack of labor-saving mechanisms.
Innovation Solution
An auto bending structure for sunshades featuring a simpler design with a sliding rod and pulley mechanism, incorporating a return spring and guide pin for flexible rotation, and reduced number of pulleys and elastic parts, allowing for smooth and labor-saving operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a traditional bending device with upper protruding connector, lower concave connector, positioning rod, spring pin and spring is used, then the bending positioning function is provided, but the bending angle cannot reach the proper angle for scarf joint due to load constraints and excessive bending occurs when scarf rod is detached
Solution Approach 1:
The patent employs a return spring that automatically pushes the upper bending section to return to its initial position after bending operations. This self-service mechanism eliminates the need for manual resetting and ensures consistent bending angle precision while maintaining scarf joint reliability through controlled motion.
Solution Approach 2:
The patent introduces a dynamic bending mechanism where the upper bending section can rotate relative to the lower bending section through a defined range of motion. This dynamic structure allows the system to adapt to load changes while maintaining proper bending angles for scarf joints, resolving the contradiction between angle precision and joint reliability.
2Ease of operation
If the auto bending mechanism with multiple pulleys, internal spring, and complex connecting structure is used, then the bending function is achieved, but the structure becomes complicated and production cost increases
Solution Approach 1:
The patent extracts and eliminates unnecessary components from the bending mechanism. By removing redundant pulleys and simplifying the connecting structure while retaining the essential return spring mechanism, the design achieves ease of operation with significantly reduced structural complexity and lower production costs.
Solution Approach 2:
The patent merges multiple functions into fewer components. The upper bending section integrates both the bending action and the return motion through a single rotational joint with the lower bending section, eliminating the need for separate complex mechanisms and reducing overall device complexity.
3Adaptability or versatility
If the traditional bending structure with fixed components is used, then the structure is stable, but the rotation is inflexible and labor-saving mechanism is lacking
Solution Approach 1:
The return spring provides an automatic return function that reduces operational labor intensity. After the upper bending section is rotated to the desired angle for scarf joint, the return spring automatically pushes it back to the initial position, eliminating the need for manual resetting and providing a labor-saving mechanism.
Solution Approach 2:
The patent creates a flexible rotation system where the upper bending section can rotate freely within a defined range relative to the lower bending section. This dynamic joint provides adaptability for different bending angles while the return spring ensures controlled motion, combining rotation flexibility with reduced operational effort.
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 solution provides a cost-effective, simpler structure that enables flexible rotation and balanced bending, reducing the complexity and production costs while ensuring smooth operation and practicality.
Implementation Method 1
a return spring is provided at the upper section of the stem, one end of the umbrella string is fixed with a lower nest, and the other end is connected with a rotating handle after passing a fast pulley in the upper section of umbrella stem and passing through the return spring
Implementation Method 2
one end of the umbrella string is fixed with a lower nest, and the other end is connected with a rotating handle after passing a fast pulley in the upper section of umbrella stem
Data Source
AI summary
An auto bending structure of sunshade has an upper section of bending and a lower section of bending, which are connected by a sliding rod with a top through hole and a bottom through hole. The bottom through hole has a guide pin sliding in an arc groove provided on the scarf joint part of the lower section of bending, linear groves corresponding to the arc groove are provided on both sides of the groove of the upper section of bending. A sliding sleeve with a bottom through hole is provided on the top of said sliding rod, the bottom through hole of said sliding sleeve is corresponding to the top through hole of the sliding rod. The upper section of umbrella stem is provided with a linear groove which is surrounded by a ring, the ring is connected with the sliding rod and sliding sleeve by the connecting pin, which slides in the linear groove to make the ring to cooperate with the lower nest moving up and down as pulled by the umbrella string.