Friction Adjustment Member for Architectural Covering Panel Stability

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Solution Overview

Problem

Architectural coverings, such as bifold and bipass shutters, often experience undesired movement due to uneven surfaces, leading to panels sliding on their own without user input, which is undesirable.

Innovation Solution

Incorporating a friction adjustment member that can be manipulated to increase or decrease friction between the carrier and rail, allowing users to inhibit unwanted movement while maintaining ease of operation by engaging or disengaging with the rail through a user-friendly mechanism.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If friction between the carrier and rail is increased to prevent unwanted panel movement, then panel stability is improved, but operation difficulty increases

Engineering Contradiction:
Improvepanel stabilityVSAvoidoperation difficulty
Core Design Contradiction:
Stability of the object's compositionVSEase of operation

Solution Approach 1:

The friction adjustment member enables dynamic adjustment of friction levels between the carrier and rail. Users can manipulate this member to increase friction when panel stability is needed (preventing unwanted movement) and decrease friction when ease of operation is required. This transforms a static friction system into a dynamic one that adapts to different operational needs.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The invention changes the friction parameter of the carrier-rail interface by introducing an adjustment member that can modify the normal force or contact characteristics. By altering this physical parameter, the system transitions between states of high friction (for stability) and low friction (for ease of operation), resolving the contradiction between these two opposing requirements.

Inventive Principle:
Principle #35Parameter changes

2Reliability

If friction is increased to inhibit unwanted panel movement, then reliability is improved, but device complexity increases

Engineering Contradiction:
ImprovereliabilityVSAvoiddevice complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The friction adjustment member is designed to be manipulated by the user themselves without requiring external assistance or complex adjustment mechanisms. The user can directly adjust the friction level to match installation conditions, making the system self-adapting and reducing overall device complexity while maintaining reliability.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

By providing a simple mechanism to change the friction parameter, the system achieves reliable panel positioning without requiring complex mechanical structures. The adjustment member allows friction to be tuned to account for variations in installation conditions and wear over time, maintaining reliability through parameter adjustment rather than structural complexity.

Inventive Principle:
Principle #35Parameter changes

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 adjustment member effectively prevents panels from moving without user input while allowing easy operation by adjusting friction levels, accommodating installation conditions and wear, thus ensuring the panels remain in desired positions.

Implementation Method 1

The adjustment member may be manipulated to increase friction in the architectural covering so a covering member (e.g., a panel) of the architectural covering does not move as freely as it would without the increased friction

Methodology Applied
Scientific EffectFriction: Friction

Data Source

PatentUS10604930B2Friction adjustment member for architectural covering
Publication Date: 2020.03.31 HUNTER DOUGLAS INC
  • US10604930B2 patent drawing
  • US10604930B2 patent drawing
  • US10604930B2 patent drawing

AI summary

An architectural covering may include an adjustment member configured and positioned to adjust friction affecting movement of the covering. The adjustment member may be manipulated to increase friction in the architectural covering so a covering member (e.g., a panel) of the architectural covering does not move as freely as it would without the increased friction, yet the covering member nonetheless remains simple to operate. The additional friction may be effective to inhibit the covering member from moving across an associated architectural feature on its own without a user's input.