Shaft-Free Pleated Insect Screen With Elastic Drawstring
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing insect screens and roller shutter systems are complex to assemble and handle, requiring winding shafts and intricate mechanisms, which complicates the integration of insect-proof and sun protection features.
Innovation Solution
A protective device using a pleated fabric with a rubber-elastic drawstring, guided through openings in the fabric folds and held by end strips, which eliminates the need for winding shafts and employs a simple, shaft-free extension and retraction mechanism, allowing for easy assembly and operation as an insect screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If winding shafts and intricate mechanisms are used in roller shutter systems, then the insect screen can be integrated with sun protection features, but the assembly and handling become complex
Solution Approach 1:
The device is divided into two independent functional components: a roller shutter curtain for sun protection and a pleated fabric for insect protection. Each component operates independently with its own simple mechanism, avoiding the need for complex integrated winding shafts while maintaining both functions
Solution Approach 2:
The insect screen function is extracted from the traditional roller shutter mechanism. Instead of integrating both functions into one complex system, the pleated fabric is taken out as a separate element that attaches to the roller shutter, simplifying the overall device while providing dual functionality
2Reliability
If a rubber-elastic drawstring is used in the pleated fabric, then the fabric maintains tension in extended position and retracts without forming loops, but the mechanism requires elimination of winding shafts
Solution Approach 1:
The traditional mechanical winding shaft system is replaced with an elastic drawstring mechanism. The rubber-elastic material provides the necessary tension and retraction forces through its elastic properties, eliminating complex mechanical components while maintaining reliable operation
Solution Approach 2:
The physical state of the drawstring is changed from rigid (traditional cords) to elastic (rubber-elastic material). This parameter change allows the drawstring to automatically maintain tension and retract without forming loops, achieving reliable performance through material property modification rather than complex mechanism design
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 straightforward, easy-to-assemble insect screen that maintains tension in the extended position and retracts without forming loops, ensuring a simple and reliable protective device with reduced housing dimensions.
Implementation Method 1
A protective device using a pleated fabric with a rubber-elastic drawstring, guided through openings in the fabric folds and held by end strips, which eliminates the need for winding shafts and employs a simple, shaft-free extension and retraction mechanism
Data Source
Figure 1a
Figure 1b
Figure 2
AI summary
The invention relates to a protective device (7), in particular as an insect screen, for mounting on a roller shutter curtain (2) guided in vertical roller shutter tracks (6) with a number of roller shutter slats (3, 3') articulated to each other, with a pleated fabric (9) whose opposing fabric ends (92a, 92b) are held on each end slat (14, 15), wherein the pleated fabric (9) is guided on at least one rubber-elastic pull cord (13) running between the end slats (14, 15), and wherein a first of the two end slats (14) can be attached to a roller shutter end slat (3') of the roller shutter curtain (2) and the second end slat (15) can be attached to at least one of the roller shutter tracks (6) and held in the mounted state.