Self-Stopping Roller Blind With In-Shaft Spring to Reduce Light Leakage
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Solution Overview
Problem
Existing spring roller blinds have structural issues that lead to light leakage and increased production costs due to the placement of components outside the roller shaft, resulting in a thicker bracket housing and complex installation processes.
Innovation Solution
A self-stopping roller blind mechanism with a spring integrated inside the roller shaft, featuring a rotating assembly and spring assembly that synchronously rotate, storing energy to raise and wind the curtain, reducing the bracket's thickness and simplifying the structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the spring assembly and rotating assembly are placed outside the roller shaft in traditional designs, then the structure is simpler to manufacture, but the bracket housing thickness increases causing light leakage
Solution Approach 1:
The spring assembly and rotating assembly are nested inside the roller shaft, with the spring assembly positioned within the hollow interior space of the roller shaft and the rotating assembly integrated around it. This nesting arrangement allows the winding mechanism to be contained within the roller shaft's existing dimensions, eliminating the need for external bracket housing extensions and thus preventing light leakage while maintaining manufacturing simplicity.
2Ease of operation
If the spring assembly is placed outside the roller shaft, then installation is easier, but the gap between bracket housing and curtain fabric increases causing light leakage
Solution Approach 1:
The spring assembly is nested within the hollow interior of the roller shaft, and the rotating assembly is integrated around it, creating a compact unit that fits precisely within the roller shaft boundaries. This eliminates external protrusions that would create gaps between the bracket housing and curtain fabric, thereby preventing light leakage while maintaining easy installation through the standardized roller shaft interface.
3Ease of repair
If traditional external spring assembly design is used, then component access is easier, but the overall structure becomes more complex increasing production costs
Solution Approach 1:
The spring assembly and rotating assembly are nested within the roller shaft's hollow interior, creating a compact integrated structure. This reduces the number of external components and interconnections needed, simplifying the overall structure and reducing production costs. The nested design allows components to be accessed through the roller shaft ends or during manufacturing assembly, maintaining serviceability while eliminating the complexity of external mounting structures.
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
This design minimizes light leakage, reduces production costs, and enhances user convenience by allowing for adjustable pre-tightening and easy installation, with flexible use options for different curtain sizes and weights.
Implementation Method 1
When the rotating part rotates in the second direction, the spring assembly stores potential energy. By releasing the stored potential energy of the spring assembly, it drives the spring assembly, the rotating part, and the roller shaft to rotate and reset in the first direction
Data Source
AI summary
The disclosure relates to the field of curtain technology and discloses a self-stopping roller blind mechanism with spring integrated in roller shaft and a hand-held curtain. The self-stopping roller blind mechanism with spring integrated in roller shaft includes a mounting bracket, a winding device, and a roller shaft connected to the winding device. The winding device includes a rotating assembly and a spring assembly. The rotating assembly includes a fixed part connected to the mounting bracket and a rotating part that can rotate along its own circumference. The rotating part rotates synchronously with the roller shaft. When the rotating part rotates, it has a first direction that raises the curtain fabric and a second direction that lowers the curtain fabric. The spring assembly is connected to the rotating part and rotates synchronously, and the spring assembly is placed inside the roller shaft.