Tamper-Evident Flip-Top Closure with Spring-Loaded Indication
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Solution Overview
Problem
Existing closure devices for containers lack an effective tamper-evident mechanism to indicate whether the flip-top lid has been opened, which can lead to misuse or incorrect handling, especially in applications where the container is positioned upside down.
Innovation Solution
A closure device with a tamper-evident unit comprising a first and second element connected by a frangible bridge, where the first element is movable between positions, and a spring applies a force to push it into a visible second position when the lid is opened, ensuring indication of use without external manipulation, and featuring transparent or translucent materials for clear visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a tamper-evident mechanism is added to indicate lid opening status, then reliability of usage indication is improved, but device complexity increases
Solution Approach 1:
The tamper-evident mechanism is segmented into distinct functional elements: a first element attached to the base, a second element attached to the flip-top lid, and frangible bridges connecting them. This segmentation allows each component to perform its specific function independently while maintaining overall system simplicity.
Solution Approach 2:
The second tamper-evident element is positioned within the closure structure such that it becomes visible through the flip-top lid when the frangible bridges are broken. This nesting approach allows the indication mechanism to be integrated within the existing closure geometry without adding external protrusions or complex assemblies.
2Difficulty of detecting and measuring
If transparent or translucent materials are used for visibility, then ease of detecting tamper indication is improved, but manufacturing precision requirements increase
Solution Approach 1:
The flip-top lid is made transparent or translucent specifically in the region where the second tamper-evident element is positioned, allowing visual detection of the indication. This localized transparency approach enables the indication function without requiring the entire closure to be manufactured with precise transparency control, thereby reducing overall manufacturing precision requirements.
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 solution provides a reliable and user-friendly tamper-evident indication that the flip-top lid has been opened, maintaining secure attachment and preventing misplacement of parts, ensuring correct handling and easy recycling, while maintaining functionality regardless of container orientation.
Implementation Method 1
said base element comprises at least one spring element being arranged such that it applies a force FS onto said first tamper evident element into a direction towards the second position of said first tamper evident element
Data Source
AI summary
The present invention relates to a closure for a container with a base element (100), a flip-top lid (200) attached to said base element (100) by a hinge (150) such that the flip-top lid (200) can be moved between an opened and a closed position, and with a tamper evident unit (400) for indicating whether the flip-top lid (200) had been opened at least once by a user or not. Said tamper evident unit (400) comprising a first tamper evident element (420) and a second tamper evident element (440), which are, when said closure is in its as-manufactured status or when said flip-top lid (200) has not been opened yet by the user, connected to each other by at least one frangible bridge (430). Said first tamper evident element (420) is attached to the base element (100) such that it is movable between a first position and a second position, wherein said first tamper evident element (420) is in its first position, when said closure is in its as-manufactured status or when said flip-top lid (200) had not been opened yet by the user, and said first tamper evident element (420) is in its second position, when said flip-top lid (200) had been opened at least once by the user.