Pre-torsioned Spring Assembly for Roller Blind Torque Control
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Solution Overview
Problem
Spring-assisted roller blind systems require significant customization and frequent adjustments during installation due to variability in blind materials and components, leading to inefficient and costly installation processes, with potential performance deviations from rated specifications.
Innovation Solution
Incorporating a pre-torsioned spring assembly with preset torsion values into the roller blind assembly, which reduces the need for on-site calibration and minimizes the need for pre-assembling and testing, allowing for more efficient and cost-effective installation by ensuring correct performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional spring-assisted roller blind systems are used, then the blind can be raised and lowered with spring assistance, but significant customization and frequent adjustments are required during installation due to variability in blind materials and components
Solution Approach 1:
The patent applies parameter changes by providing springs with different rated performances (varying spring constants, lengths, and materials) to match different blind weights and configurations. The system allows selection of appropriate spring parameters based on blind material weight, roller diameter, and blind dimensions, thereby resolving the contradiction between providing spring assistance and avoiding excessive customization complexity through standardized parameter selections.
Solution Approach 2:
The patent applies preliminary action by pre-calculating and specifying the required spring parameters before assembly based on blind specifications. The manufacturer determines the appropriate spring rated performance in advance based on blind weight and dimensions, allowing the spring-assisted system to be assembled without requiring frequent on-site adjustments, thus reducing installation complexity while maintaining operational ease.
2Adaptability or versatility
If multiple springs with different rated performances are provided to accommodate various blind weights, then different blind configurations can be supported, but individual spring performance deviates from rated performance by +/â5%, +/â10%, or more
Solution Approach 1:
The patent addresses performance deviation by providing springs with different rated performances and selecting the appropriate spring based on blind specifications. By offering a range of spring parameters (different spring constants, lengths, and materials), the system compensates for individual spring variations, ensuring that the selected spring's rated performance closely matches the required performance for the specific blind configuration, thereby improving reliability while maintaining adaptability.
Solution Approach 2:
The patent applies feedback by using the actual blind weight and dimensions to select the appropriate spring rated performance. The selection process incorporates feedback from blind specifications to choose a spring whose rated performance accounts for potential individual variations, ensuring more accurate matching between spring capability and blind requirements, thus reducing performance deviation.
3Reliability
If manufacturers assemble and test each roller blind system before installation, then correct performance can be ensured, but efficiency decreases and costs increase
Solution Approach 1:
The patent applies preliminary action by performing the calculation and selection of appropriate spring parameters before assembly. The manufacturer determines the required spring rated performance in advance based on blind specifications, allowing for more efficient assembly without requiring extensive post-assembly testing. This preliminary determination ensures correct performance while improving productivity by eliminating the need for time-consuming trial-and-error assembly and testing of each system.
Solution Approach 2:
The patent addresses the contradiction by providing springs with different rated performances that can be selected based on blind specifications. This parameter variation allows manufacturers to confidently assemble systems with predetermined performance characteristics, reducing the need for extensive testing while ensuring correct performance. The standardized parameter selections enable more efficient assembly processes.
4Reliability
If fine or precise adjustments are made during on-site installation, then correct calibration can be achieved, but installation time increases and return visits may be required
Solution Approach 1:
The patent applies preliminary action by determining the appropriate spring parameters before installation. The manufacturer calculates and specifies the required spring rated performance based on blind weight and dimensions, allowing the system to be pre-calibrated before reaching the installation site. This preliminary determination minimizes the need for fine adjustments during on-site installation, reducing installation time and the likelihood of return visits while ensuring correct calibration.
Solution Approach 2:
The patent addresses on-site calibration time by providing springs with different rated performances that can be selected to match blind specifications. By offering varied spring parameters (different spring constants, lengths, and materials), the system allows selection of a spring that requires minimal adjustment during installation, thereby achieving correct calibration more quickly and reducing installation time and potential return visits.
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 pre-torsioned spring assembly simplifies the installation process by providing consistent torque assistance, reducing the need for on-site adjustments and ensuring the roller blind system operates as intended, thereby increasing efficiency and decreasing costs.
Implementation Method 1
a spring extending around the shaft, the spring having a first spring end coupled proximate to the first shaft end and a second spring end operatively coupled proximate to second shaft end, wherein the spring has a preset torsion
Implementation Method 2
the spring has a preset torsion; wherein the pre-torsioned spring assembly exerts a torque on the blind roller proportional to the preset torsion of the spring to assist rotation of the blind roller
Data Source
AI summary
A roller blind assembly includes a blind roller, a clutch assembly that includes a bracket engagement member, and a pre-torsioned spring assembly that includes a spring. The pre-torsioned spring assembly is positioned in an interior cavity of the blind roller, and exerts a torque proportional to a preset torsion of the spring to promote rotation of the blind roller relative to the bracket engagement member. Rotation of the blind roller relative to the bracket engagement member in a first direction decreases torsion in the spring while rotation of the blind roller relative to the bracket engagement member in a second direction increases torsion in the spring. The pre-torsioned spring assembly is preferably selected from a group of at least two pre-torsioned spring assemblies, each spring assembly having a different spring preset torsion.