Self-Orienting Bead Chain Connector for Architectural Coverings
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Solution Overview
Problem
Existing architectural-structure coverings with bead chains face challenges in smooth operation across pulleys, rollers, or bearings, particularly in maintaining tautness and efficient movement between extended and retracted positions, due to the need for secure anchoring and aesthetically pleasing tensioned elements.
Innovation Solution
A connector designed to couple with bead chains, allowing them to form a continuous loop and move smoothly across or through pulleys, rollers, or bearings by self-orienting to minimize resistance, featuring a concave surface that aligns with the bearing's convex surface, ensuring smooth operation and reduced resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the bead chain is securely anchored at the bottom of the architectural structure via a tensioner, then child safety and aesthetic appeal are improved, but the operation complexity and difficulty of maintaining smooth movement increase
Solution Approach 1:
The connector is designed with a self-orienting mechanism that automatically aligns its concave surface with the bearing's convex surface during movement, eliminating the need for external alignment tools or complex adjustment mechanisms. The shape memory material enables the connector to self-correct its orientation, making the system self-servicing and reducing operational complexity while maintaining secure anchoring
Solution Approach 2:
The connector utilizes shape memory material that changes its physical parameters (shape and orientation) in response to temperature or stress changes. This parameter change allows the connector to transition between different states, enabling automatic alignment with the bearing and maintaining tension without requiring complex mechanical adjustment mechanisms
2Ease of operation
If the connector has a complex self-orienting mechanism with curved surfaces, then smooth movement across bearings is improved, but manufacturing complexity increases
Solution Approach 1:
The connector incorporates a concave curved surface that complements the convex curved surface of the bearing. This curvature design allows the connector to naturally roll and align itself with the bearing during movement, facilitating smooth operation. The curved geometry is achieved through standard molding or forming processes, making it manufacturable despite the complex motion it enables
Solution Approach 2:
The connector is made from shape memory material, which is a composite or specially engineered material that combines elastic properties with memory functionality. This material choice allows the connector to achieve complex self-orienting behavior while being manufactured as a single integrated component, reducing assembly complexity
3Shape
If the bead chain is maintained in a taut condition through tensioner anchoring, then aesthetic appeal is improved, but the force required to operate the covering increases
Solution Approach 1:
The connector maintains the bead chain in a taut condition dynamically through its self-orienting mechanism. As the connector moves across the bearing, its concave surface automatically aligns with the convex bearing surface, creating a rolling motion that maintains tension without requiring excessive force. This dynamic alignment reduces friction and resistance compared to a fixed or misaligned connector design
Data Source
AI summary
A connector for coupling to a bead chain is disclosed. In use, the connector is arranged and configured so that the connector can pass over a bearing. In one example of an embodiment, the bearing is positioned in a tensioner so that the connector moves through the tensioner, which is operatively coupled to the bead chain. In one example embodiment, application of a force on the bead chain to move the covering between an extended position and a retracted position, self-orients the connector so that a top portion of the connector faces and/or contacts the bearing so that the connector smoothly passes across an exterior arcuate surface of the bearing. In one example embodiment, the top portion includes a curved surface to contact the curved surface of the bearing.