Releasable Container Cap with Expandable Gaps
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Solution Overview
Problem
Conventional container caps require multiple turns and often both hands to remove, making them inconvenient for use in situations like driving or being occupied.
Innovation Solution
A releasable container cap design featuring expandable gaps and inwardly pressable tabs that allow the cap to be disengaged from the container without rotation, utilizing a circular top piece with internal threaded sidewall sections and outwardly bulging tabs that flex outward to disengage threads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional threaded caps are used, then secure engagement with the container is achieved, but removal requires multiple turns and both hands
Solution Approach 1:
The cap is divided into two separate sidewall sections instead of a continuous structure. Each sidewall section has its own threaded portion that engages with the container neck. This segmentation allows independent movement of each section, enabling the breakthrough mechanism where tabs can press one sidewall inward while the other remains engaged, facilitating quick one-handed removal without requiring full rotational unwinding
Solution Approach 2:
The cap transitions from a static rigid structure to a dynamic flexible structure. The sidewall sections are made flexible allowing them to bend and deform during operation. The tabs press the sidewall sections inward causing them to flex and disengage from the threads dynamically, enabling quick release without multiple rotational turns. This dynamic flexibility is maintained while preserving secure engagement during normal use
2Ease of operation
If the cap structure is made flexible to enable easy release, then removal ease improves, but structural strength may be compromised
Solution Approach 1:
By segmenting the cap into two sidewall sections, the flexible portions are localized to specific regions (the sidewall sections) while the overall cap structure maintains integrity. The segmentation allows flexibility exactly where needed for release while preserving strength in the top piece and engagement regions. Each sidewall section can flex independently without compromising the entire cap structure
Solution Approach 2:
The cap employs different mechanical properties in different locations. The sidewall sections are made flexible to allow bending and disengagement, while the top piece and thread engagement regions maintain rigidity for secure sealing and engagement. This local differentiation of material properties or structural characteristics enables both flexibility for easy release and strength for secure engagement simultaneously
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 easy one-handed removal and resealing of the cap, improving convenience and usability, especially in situations where hands are occupied.
Implementation Method 1
the tabs are configured to be pressed inward thereby causing the sidewall sections to flex outward to disengage the threads of the container
Data Source
AI summary
A container has an improved releasable cap, the container including a neck having external threads. The cap includes: a circular top piece for sealing the container; two sidewall sections connected to the top piece each having an internal threaded portion for engaging the neck of the container. Each sidewall section has two circumferential ends each spaced from an adjacent circumferential end of the other sidewall section such that two diametrically opposed expandable gaps are defined between the spaced circumferential ends. Two tabs each span a respective one of the two gaps, the tabs bulging outward from the sidewall section. The tabs are configured to be pressed inward thereby causing the sidewall sections to flex outward to disengage the internal threaded portions thereof from the external threads of the neck of the container permitting the cap to be removed therefrom.