Curtain Hanging Assembly With Opposing Elastic Torque

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Solution Overview

Problem

Existing curtain assemblies lack the ability to naturally fix the let-down area of curtains at any position due to insufficient opposing torque forces, which is a safety concern, especially for child safety as they eliminate pull cords.

Innovation Solution

The curtain assembly incorporates two elastic motor units with roll up and let down feedback units and take up and let down opposing units, configured with helical springs or leaf springs, that produce equal opposing torque forces through linear linkage, allowing the curtains to be fixed at any position, and includes a pressure regulation device to adjust initial torque.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If a single elastic feedback unit is used to pull up the window shade, then the window shade can be taken up, but the let down area cannot be naturally fixed at any position due to insufficient opposing torque forces

Engineering Contradiction:

Improveposition fixation stabilityVSAvoidopposing torque force

Core Design Contradiction:

Stability of the object's compositionVSForce

Solution Approach 1:

The single elastic feedback unit is divided into two separate elastic motor units (first and second elastic motor units), each providing opposing torque forces. This segmentation allows the system to achieve balanced opposing forces that can naturally fix the curtain at any position, resolving the instability caused by insufficient opposing torque.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The second elastic motor unit acts as a counterweight mechanism to the first elastic motor unit, providing equal and opposite torque forces. This counterbalancing arrangement creates the necessary opposing forces to stabilize the curtain at any desired position without requiring pull cords.

Inventive Principle:

Principle #8Anti-weight (Counterweight)

2Ease of operation

If pull cords are used to operate the curtain, then the curtain can be easily operated, but child safety is compromised

Engineering Contradiction:

Improvecurtain operation convenienceVSAvoidchild safety hazard

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The hazardous pull cord component is completely removed from the system. Instead, the invention uses elastic motor units with opposing torque forces that can be operated through safe mechanical interfaces (such as a lower rail that can be grabbed), eliminating the safety hazard while maintaining operational convenience.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The elastic motor units are configured to provide self-balancing opposing torque forces that automatically maintain the curtain at any position. This self-service mechanism eliminates the need for continuous manual control or hazardous pull cords, as the system inherently maintains its state through the balanced elastic forces.

Inventive Principle:

Principle #25Self-service

3Force

If elastic feedback units are configured to produce maximum pulling force at lowest position, then the window shade can be pulled down, but the let down area cannot be naturally fixed at intermediate positions

Engineering Contradiction:

Improvepulling forceVSAvoidintermediate position stability

Core Design Contradiction:

ForceVSStability of the object's composition

Solution Approach 1:

The elastic motor units are configured with dynamic torque characteristics that vary with position. The opposing torque forces are designed to balance at any intermediate position, creating natural fixation points throughout the range of motion. This dynamic balance allows the curtain to be pulled down while maintaining stability at any desired intermediate position.

Inventive Principle:

Principle #15Dynamics

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 configuration enables the curtains to be naturally fixed at any position, providing additional load torque and ensuring safety by allowing the horizontal lifting rod to be balanced and adjusted, suitable for window shades and slatted blinds, including venetian blinds, with the option to replace elastic components with electric motors for remote operation.

Implementation Method 1

stored energy members used by the elastic motor units being helical springs, or elastic metal sheets that are formed as leaf springs by scrolling

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

at least fitted with a pressure regulation device able to adjust initial torque

Methodology Applied

Scientific EffectPressure: Pressure Increase

Data Source

PatentUS11486196B2Curtain hanging assembly

Publication Date: 2022.11.01 HUANG HSIEN TE

AI summary

A curtain hanging assembly that consists of a curtain assembly able to effect horizontal opening and closing of curtains, and includes two elastic motor units provided with elastic feedback. Interactive dynamics between the two elastic motor units, through linear linkage, respectively cause torque forces produced to be in mutual opposition, enabling the let down area of the curtains to be naturally fixed at any height position.