Ergonomic Closure Ribs for Torque Reduction
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Solution Overview
Problem
Existing container caps require excessive torque for removal and replacement, making them difficult for individuals with small, large, or arthritic hands to use effectively, and existing solutions have not provided a cap that is easily manipulable while maintaining sealing functionality.
Innovation Solution
A cap design featuring a non-planar wall edge with a sinusoidal shape and flexible ribs, made from materials like polypropylene, which allows for efficient deformation and increased gripping surface, reducing the required force for operation and incorporating measuring markings for volume measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cap is designed with a tight sealing mechanism, then sealing reliability is improved, but the torque required for removal and replacement increases
Solution Approach 1:
The cap is segmented into distinct functional zones: a rigid sealing portion that maintains tight closure, and a flexible gripping zone with ribs that facilitates easy removal. This segmentation allows the sealing mechanism to maintain reliability while the gripping portion reduces the torque needed for operation.
Solution Approach 2:
Different portions of the cap have different mechanical properties: the sealing area is designed with high rigidity to ensure tight closure, while the gripping area incorporates flexible ribs with lower rigidity to enable easy manipulation. This local differentiation resolves the contradiction between tight sealing and easy removal.
2Ease of operation
If the cap gripping surface is increased to improve ease of operation, then ease of operation is improved, but the cap complexity increases
Solution Approach 1:
The gripping ribs are merged with the cap wall structure itself rather than being separate components. This integration increases the gripping surface area and improves ease of operation while avoiding the complexity of additional parts or assembly steps.
Solution Approach 2:
The cap incorporates flexible ribs that can deform under gripping force, providing enhanced grip without requiring a larger overall cap size or complex mechanisms. The flexibility of these thin structural elements improves operability while maintaining simplicity.
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 cap design facilitates easier and more comfortable operation by increasing surface contact and energy transfer, allowing for efficient removal and replacement without excessive force, making it usable by individuals with varying hand sizes or abilities.
Implementation Method 1
the outer wall surface at the first wall edge has a flex modulus of less than about 3.95 N/mm
Implementation Method 2
at least one rib connecting the outer cap surface and the inner wall surface
Data Source
AI summary
A closure for sealing a container comprising a cap having an outer cap surface and an inner cap surface, wherein said cap is capable of being removably attached to the container, and a wall having a first wall edge, a second wall edge, an outer wall surface and an inner wall surface.