Enclosed Blind Cord Drive for Hazardous Loop Elimination
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Solution Overview
Problem
Existing window and architectural passage coverings that rely on cords pose a significant hazard to children due to entanglement risks, leading to injuries and fatalities, and current retrofit solutions do not adequately eliminate hazardous loops created by beaded cords or internal lift cords.
Innovation Solution
A cordless architectural covering system featuring an enclosed drive mechanism that encases pull cords and lift cords, incorporating a cord lock disablement mechanism and a handle-driven system with pulley mechanisms to ensure safe operation without exposing hazardous loops, which can be retrofitted into existing systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional pull cords are used for operating blinds and shades, then the operation is simple and direct, but hazardous loops are created that can entangle children
Solution Approach 1:
The hazardous pull cord is extracted from the operational mechanism. Instead of using a traditional pull cord that extends outside the blind structure, the patent routes the cord entirely within the headrail enclosure, removing the hazardous element from children's reach while preserving the lifting function through alternative operational mechanisms.
Solution Approach 2:
The cord is nested within the headrail enclosure structure. The patent designs the headrail to contain the cord internally, with the cord running through channels or compartments within the headrail housing, effectively hiding the hazardous element inside a protective structure that forms part of the blind assembly.
2Object-affected harmful factors
If cord locks are used to hold blinds in position, then the blinds can be secured at various heights, but the cord lock mechanism creates additional entanglement risks
Solution Approach 1:
The cord lock mechanism is extracted from the external cord assembly and relocated entirely within the headrail enclosure. The patent positions the locking mechanism inside the headrail where it operates on the internally routed cord, eliminating the external loop that children could access while maintaining the positioning function.
Solution Approach 2:
An intermediary mechanism is introduced between the user's pulling action and the cord lock engagement. The patent uses a series of internal components including guides, pulleys, and engagement mechanisms that translate the user's pull into controlled cord lock activation, providing a safer interface that prevents direct access to hazardous cord loops.
3Object-affected harmful factors
If existing retro-fit devices are used to secure pull cords, then the cords can be tied to walls, but hazardous loops are not eliminated and cords can still become tangled
Solution Approach 1:
The retro-fit solution merges the cord containment function with the existing headrail structure. Instead of adding separate external containment devices that attach cords to walls, the patent integrates the enclosure and cord routing system into the headrail itself, creating a unified structure that eliminates loops while maintaining compatibility with existing blind mechanisms.
Solution Approach 2:
The headrail is segmented into functional zones for cord routing, locking, and user interaction. The patent divides the headrail structure into compartments and channels that separately handle different functions of the cord system, allowing the hazardous portions to be isolated and contained while maintaining operational accessibility.
4Object-affected harmful factors
If the cord is enclosed within the headrail, then safety is improved, but the mechanism for operating the blinds becomes more complex
Solution Approach 1:
The headrail enclosure serves multiple functions simultaneously: it contains the cord for safety, provides structural support for the blind, houses the locking mechanism, and guides the operational cord. The patent designs the enclosure to perform these diverse functions through integrated features, reducing the need for separate components and minimizing overall system complexity.
Solution Approach 2:
The enclosed cord system is designed to be self-managing through internal routing and automatic engagement features. The patent incorporates self-aligning guides, automatic cord tensioning, and self-locking mechanisms that reduce the complexity of user interaction while maintaining safety, allowing the system to regulate itself without requiring complex external control mechanisms.
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 solution effectively eliminates the risk of entanglement by concealing cords within an enclosure, allowing safe operation and maintenance of blinds and shades while reducing the force required to manage the blinds, thus enhancing safety and functionality.
Implementation Method 1
incorporating a handle mechanism with pulley systems for efficient operation
Data Source
AI summary
An enclosed drive system for use in conjunction with a lift cord extending from a headrail of an architectural cover. The enclosed system encases and engages the lift cord with a drive mechanism within the enclosure, thereby avoiding hazardous loops. A method for retro-fitting an architectural cover lift cord assembly including a lift cord associated with a cord lock and extending from a headrail of the architectural cover is also described, for modifying the architectural cover to eliminate hazardous loops therefrom. Also disclosed in this disclosure is a cord lock mechanism that pinches the cord, a handle that actuates the cord lock mechanism, and a driving mechanism having a cord guide that engages the cord and a slider that slides along the handle to actuate the cord while the cord is enclosed within an enclosure defined by the handle.