Blind Rail Weight Chamber Design to Prevent Cord Interference
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Solution Overview
Problem
Conventional methods for adding weight to blinds to enhance stability and facilitate lowering are cumbersome, as weights can become dislodged during transport, obstruct cord routing, and lack flexibility in positioning, making it difficult to adjust or add weights later in the assembly process.
Innovation Solution
The design incorporates a second chamber remote from the cord chamber to house the weight, allowing optimal positioning and preventing interference with cords, with weights attached via adhesive, interference fit, or clamping, and optionally using a bent or spring rod to maintain position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If weights are attached to the inner surface of the central wall using conventional methods (adhesive, double-sided tape, Velcro), then the rail gains extra weight for stability and to overcome friction, but the weights may become dislodged during transport and slide in the rail causing damage to end caps
Solution Approach 1:
The rail is divided into two separate chambers: a cord chamber for receiving and routing cords, and a weight chamber for receiving and retaining weights. This segmentation prevents weights from interfering with cord routing and eliminates the risk of weights becoming dislodged during transport, as the weight chamber is specifically designed to secure weights at optimal positions.
Solution Approach 2:
A cover is introduced as an intermediary component that closes the weight chamber. The cover is retained by retention means (such as clips, snaps, or adhesive) and prevents weights from becoming dislodged while still allowing for easy access during assembly and installation. This mediator resolves the contradiction between securing weights and allowing for adjustment.
2Force
If weights are positioned on the central wall, then they provide extra weight for stability, but they may obstruct the holes and routing of cords, limiting positioning freedom
Solution Approach 1:
The rail is divided into two separate chambers: a cord chamber for receiving and routing cords, and a weight chamber for receiving and retaining weights. This segmentation prevents weights from interfering with cord routing and eliminates the risk of weights becoming dislodged during transport, as the weight chamber is specifically designed to secure weights at optimal positions.
Solution Approach 2:
The weight chamber is positioned in a different spatial dimension relative to the cord chamber, allowing weights to be placed at optimal positions for stability without interfering with cord routing. This dimensional separation provides complete positioning freedom for weights while maintaining cord functionality.
3Ease of manufacture
If weights are mounted at an early stage of assembly prior to assembling cords, then positioning can be done, but it is difficult to add or adjust weights later if the number or position is wrong
Solution Approach 1:
A cover is introduced as an intermediary component that closes the weight chamber. The cover is retained by retention means (such as clips, snaps, or adhesive) and prevents weights from becoming dislodged while still allowing for easy access during assembly and installation. This mediator resolves the contradiction between securing weights and allowing for adjustment.
Solution Approach 2:
The weight chamber design allows for dynamic adjustment of weights during assembly and installation. The cover can be easily removed and reattached, enabling installers to add, remove, or reposition weights as needed without compromising the overall assembly. This dynamic approach resolves the contradiction between early mounting and later adjustability.
4Reliability
If weights are positioned to not interfere with cords, then cord function is maintained, but the positioning freedom is limited and weights may have to be cut to fit between adjacent holes
Solution Approach 1:
The rail is divided into two separate chambers: a cord chamber for receiving and routing cords, and a weight chamber for receiving and retaining weights. This segmentation prevents weights from interfering with cord routing and eliminates the risk of weights becoming dislodged during transport, as the weight chamber is specifically designed to secure weights at optimal positions.
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 solution ensures weights do not hinder cord function, allows for optimal positioning and adjustment, and enables easy addition or repositioning of weights, enhancing stability and ease of assembly while preventing cord interference.
Implementation Method 1
weights attached via adhesive, interference fit, or clamping
Implementation Method 2
weights attached via adhesive, interference fit, or clamping
Data Source
AI summary
A covering for an architectural opening comprising: a rail; a covering material, attached to said rail; at least two cords for guiding, supporting and/or lifting the covering material, the cords extending through the rail; and at least one weight disposed within the rail; characterised in that the rail comprises a longitudinally extending front portion, a longitudinally extending rear portion and a longitudinally extending central portion disposed between the front portion and the rear portion, and wherein said at least one weight is positioned at a location remote from the central portion.