Extendable Awning Arm Tensioning via Threaded Adjustment
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Solution Overview
Problem
Existing extendable awning pulling arms require specialized tools for prestressing the elastic element, limiting mounting and customization options, especially for intermediate customers who need to apply personalized finishes without the necessary tools or personnel.
Innovation Solution
An extendable awning pulling arm design featuring a traction element with a threaded rod and tube, allowing for adjustable tension without a special tool, and a compact configuration that enables anchoring without visible cables, facilitating easy assembly and painting of the arm elements before mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a special tool is used to pre-tension the elastic element, then the arm can be assembled with proper tension, but the mounting location is limited and customization becomes difficult
Solution Approach 1:
The arm assembly enables self-tensioning through a user-friendly mechanism where the elastic element is pre-loaded during assembly and locked in place without requiring specialized tools. The design allows end-users to perform the tensioning operation themselves using common tools, eliminating the need for professional service intervention and expanding mounting flexibility.
Solution Approach 2:
The arm is divided into modular components that can be assembled in different configurations and mounted at various locations. The segmented design allows the arm to be customized for different applications and mounting positions while maintaining proper elastic element tensioning through the integrated adjustment mechanism.
2Reliability
If the arm is assembled in the factory with the spring pre-loaded, then proper tension is achieved, but customization and painting options are limited
Solution Approach 1:
The elastic element is pre-loaded during the assembly process in a controlled manner, but the design allows this pre-loading to be performed as part of the final assembly rather than requiring factory completion. This enables customization and painting to be performed before the final tensioning operation, which can be done by the end-user or at the installation location.
Solution Approach 2:
The arm assembly incorporates dynamic adjustment capabilities that allow the elastic element tension to be modified after initial assembly. This dynamic design enables the arm to adapt to different mounting conditions and allows for post-assembly customization while maintaining reliable spring pre-loading through the integrated adjustment mechanism.
3Ease of operation
If the anchoring parts are visible, then the assembly is simple, but the aesthetic appeal is reduced
Solution Approach 1:
The anchoring components are nested within the arm structure or concealed behind decorative elements, allowing the arm to maintain a clean aesthetic appearance while preserving simple assembly operations. The nested design hides the functional anchoring parts from view while keeping the assembly process straightforward.
Solution Approach 2:
The arm design incorporates localized aesthetic treatments such as finishes, coatings, or decorative elements that cover or conceal the anchoring parts in specific areas. This local quality approach maintains the simplicity of the assembly process while enhancing the overall aesthetic appearance by hiding less visually appealing components.
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
Enables the intermediate customer to customize and assemble the arm without specialized tools, reducing costs and increasing flexibility in mounting and aesthetic appeal by hiding the anchoring parts, allowing for efficient tensioning of the elastic element using common tools like an Allen key.
Implementation Method 1
The elastic element is subjected to stress so that, in the equilibrium position and in the absence of other forces, the arm is extended. These ends are attached to a fixed component of the blind, where the roller housing is usually located. Therefore, the arms unfold by pushing the pull bar with their movable ends, which then unrolls the awning fabric.
Implementation Method 2
the section of adjustable length being provided with a threaded rod and a threaded tube which cooperates with the threaded rod
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
An extendable pull arm (B) for the front pull bar of a blind, comprising a pull element (1) provided with an elastic element (13), wherein the pull element (1) includes a section (14) of adjustable length between one of its ends (12) and the elastic element (13), the adjustable-length section (14) being provided with a threaded rod (141) and a threaded tube (142) that cooperates with the threaded rod (141). The invention also relates to a manufacturing and assembly method in which the ends of the pull element (1) are anchored and the threaded rod (141) is screwed onto the threaded tube (142) until a desired tension is obtained on the elastic element (13).