Blind Wand Assembly for Safe Cord-Loop Retrofitting
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Solution Overview
Problem
Existing blind assemblies with cord-operated window coverings pose a safety risk due to hanging cord loops that can entangle and strangle children, and retrofitting existing systems with conventional wands is costly and disruptive.
Innovation Solution
A wand system with an elongated member, a rotatable member, and a guide member that restricts perpendicular movement of the cord loop, allowing for easy retrofitting without requiring direct engagement with the drive mechanism, maintaining cord tension and minimizing loop formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional wand with rigid fixing is used to enclose the cord loop, then child safety is improved, but installation complexity and cost increase due to requiring disassembly and reinstallation of the blind assembly
Solution Approach 1:
The wand is divided into separate components: an elongated member, a rotatable member, and a guide member. This segmentation allows the wand to be assembled independently and attached to the existing blind assembly without requiring disassembly of the blind assembly itself, thus reducing installation complexity while maintaining safety functionality.
Solution Approach 2:
The wand acts as an intermediary device between the cord loop and the user/child. It encloses the cord loop in a controlled manner, preventing the cord from forming hazardous loops while allowing controlled movement. The wand can be attached to the existing blind assembly through simple attachment mechanisms without requiring integral rigid fixing, thus maintaining safety without increasing installation complexity.
2Ease of operation
If the cord loop is allowed to hang freely for easy operation, then ease of operation is improved, but safety deteriorates due to entanglement and strangulation risks
Solution Approach 1:
The elongated member of the wand provides a flexible enclosure that contains the cord loop. This flexible structure prevents the cord from forming hazardous loops while still allowing the cord to move freely enough for easy operation. The flexible nature of the wand members allows the cord to be pulled and manipulated without creating entanglement risks.
3Object-affected harmful factors
If a wand with integral rigid fixing is used, then safety is improved by enclosing the cord loop, but adaptability deteriorates as it cannot be retrofitted to existing blind assemblies
Solution Approach 1:
The wand is designed as a separate, modular assembly with distinct components (elongated member, rotatable member, guide member) that can be independently manufactured and attached to existing blind assemblies. This segmentation enables the wand to be retrofitted without requiring modification of the original blind assembly structure, thus improving adaptability while maintaining safety.
Solution Approach 2:
The wand incorporates movable and adjustable components, particularly the rotatable member that can rotate about the elongated member. This dynamic design allows the wand to adapt to different cord lengths and configurations in existing blind assemblies, enhancing versatility and retrofit capability while maintaining effective cord loop enclosure for safety.
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 wand system enhances safety by preventing hazardous loop formation while being easily installed on new or existing blind assemblies, reducing operational noise, and eliminating the need for costly reinstallation.
Implementation Method 1
a biasing member to bias the guide pathway in a direction away from the rotatable member to cause the cord passing therebetween to be under tension
Data Source
AI summary
A wand for a blind assembly comprising (a) an elongated member, (b) a rotatable member located at or adjacent one end thereof, (c) guide member located at or adjacent another end thereof; and (d) a cord having a loop, wherein the loop passes from a position remote from the rotating member, engages the rotating member, passes about the guide member and returns to the remote position after reengagement of the rotating member, wherein the loop adjacent to or within the elongated member is retained between the rotating member and the guide to restrict movement of the loop perpendicularly of the elongated member, and wherein the loop remote from the rotating member is adapted to engage and rotate a drive member of a blind assembly.