Reusable End Cap for Window Covering Rail via Elastic Bias
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Solution Overview
Problem
Existing end caps for window covering rails are not reusable while maintaining a tight fit, as securement means like crush ribs are designed for single use and do not allow for easy removal and reinstallation without losing the securement.
Innovation Solution
An end cap with an arcuate cross-sectional shape that flattens upon installation, creating a bias and using projections and tracks to secure the end cap to the rail, allowing for releasable and reusable installation with a tight fit, utilizing a combination of wedging and spring action for securement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If crush ribs are used to ensure a tight fit against the end of the rail, then the end cap is securely attached, but the end cap cannot be removed and reused while maintaining the tight fit
Solution Approach 1:
The end cap transitions from a static rigid structure to a dynamic structure with elastic properties. The body is made of elastic material that can deform during installation and removal, then return to its original shape to maintain the tight fit. This dynamic behavior allows the end cap to be repeatedly installed and removed while preserving securement.
Solution Approach 2:
The physical state of the end cap changes during operation. The elastic material undergoes reversible deformation where the shape and dimensional parameters change during installation/removal processes, then return to original parameters. This parameter change enables both secure attachment and reusability.
2Adaptability or versatility
If the end cap is designed for easy removal, then reusability is improved, but the tight fit and securement are compromised
Solution Approach 1:
The elastic body provides dynamic compliance during removal while maintaining securement during operation. The material deforms easily during removal operations but returns to its original shape to maintain the tight fit against the rail end, resolving the contradiction between ease of removal and securement.
Solution Approach 2:
The end cap utilizes reversible parameter changes in its elastic material. During removal, dimensional parameters temporarily change to facilitate easy detachment. Upon reinstallation, the parameters return to their original values, ensuring the tight fit and securement are restored for repeated use.
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
Enables the end cap to be repeatedly installed and removed without losing its securement, maintaining a tight fit and preventing accidental dislodgment, ensuring the end cap remains securely attached to the rail.
Implementation Method 1
an arcuate end cap (22) including an elastic body
Implementation Method 2
the end cap having an arcuate cross-sectional shape which is flattened when the end cap is installed, creating a bias
Data Source
AI summary
An end cap for use on a rail for a covering for an architectural opening. At least one securement leg secures the end cap to the rail.