Adjustable Torque Roller Tube Assembly

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Solution Overview

Problem

Existing window covering systems, such as roller shades, lack the ability to adjust the torque provided by internal torque generators, which can lead to inefficiencies and reduced functionality as the system ages.

Innovation Solution

A roller tube assembly with a torque generator and a torque adjustment input, allowing for adjustable torque levels. The assembly includes a roller tube, a torque generator with biasing members, a torque adjustment input with an operator-actuatable input, and mounts for secure coupling to window covering brackets.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a fixed torque generator is used in the roller tube assembly, then the initial torque requirement is met, but the system cannot adapt to aging or changing operational conditions

Engineering Contradiction:

Improvetorque adjustabilityVSAvoidtorque adjustment mechanism

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The torque generator is designed with adjustable torque characteristics, allowing the torque output to be modified during the product lifecycle. This enables the system to adapt to aging conditions and changing operational requirements while maintaining optimal performance.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The torque generator allows for changing the torque parameter through an adjustment mechanism. By modifying the torque output parameter, the system can compensate for wear, aging, or changes in window covering weight without requiring complete system replacement.

Inventive Principle:

Principle #35Parameter changes

2Ease of operation

If the torque generator is enclosed within the roller tube envelope, then the aesthetic appearance is maintained, but the adjustment input is not accessible for user operation

Engineering Contradiction:

Improveadjustment accessibilityVSAvoidroller tube envelope integrity

Core Design Contradiction:

Ease of operationVSShape

Solution Approach 1:

The adjustment input mechanism is segmented from the main roller tube envelope, allowing it to be accessible for user operation while the main enclosure remains intact for aesthetic purposes. The adjustment input can be accessed through the bracket interface without compromising the roller tube envelope.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The bracket serves as an intermediary structure that provides access to the torque generator adjustment input. Users can operate the adjustment mechanism through the bracket interface, which acts as a mediator between the user and the enclosed torque generator, maintaining both accessibility and aesthetic appearance.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If the roller tube assembly is designed as a preassembled unit, then installation time is reduced, but the ability to service individual components is limited

Engineering Contradiction:

Improveinstallation speedVSAvoidcomponent serviceability

Core Design Contradiction:

ProductivityVSEase of repair

Solution Approach 1:

The roller tube assembly is designed as a preassembled unit for rapid installation, but the torque generator is configured to be serviceable as a separate component. The modular design allows the torque generator to be accessed and serviced independently while maintaining the benefits of preassembly for the overall installation process.

Inventive Principle:

Principle #1Segmentation

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 adjustable torque levels, improving the functionality and efficiency of window covering systems by allowing for adjustments as the system ages, maintaining optimal performance and user control.

Implementation Method 1

a torque generator coupled to the roller tube and including a plurality of biasing members positioned within the roller tube

Methodology Applied

Scientific EffectElastic potential energy: Elasticity

Data Source

PatentUS20250034938A1Roller tube assembly having adjustable torque

Publication Date: 2025.01.30 DRAPER CORP

AI summary

A roller tube assembly for supporting a window covering between a first window covering bracket and a second window covering bracket may comprise a roller tube adapted to have the window covering rolled onto to raise the window covering and rolled off of to lower the window covering, a torque generator coupled to the roller tube and including a plurality of biasing members positioned within the roller tube, a torque adjustment input operatively coupled to the torque generator and including an operator actuatable input engageable from outside of an envelope of the roller tube, a first mount supporting a first end of the roller tube and adapted to be removably coupled to the first window covering bracket, and a second mount supporting a second end of the roller tube and adapted to be removably coupled to the second window covering bracket. The roller tube, the torque generator, the torque adjustment input, the first mount, and the second mount may be a preassembled unit that is adapted to be coupled to the first window covering bracket and the second window covering bracket.