Tamper-Evident Closure With Rotatable Window And Irreversible Lock
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing tamper-evident closure systems for containers face challenges in maintaining a visually distinct state after opening, as they can be reversed or restored to their original appearance, compromising their effectiveness in indicating that the container has been opened.
Innovation Solution
A tamper-evident closure system that includes a first and second portion with a window, where the second portion is rotatable relative to the first upon opening, and a locking mechanism that irreversibly locks them in a new relative position, changing the view of the first portion visible through the window from one color or design to another, ensuring a permanent visual indication of opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a closure system uses an obstructing member to hold two parts apart, then tamper-evidence is provided, but the system can be reversed by cutting the obstruction to allow the parts to be closed again
Solution Approach 1:
The closure is divided into two rotatable portions (first and second portions) that can be independently positioned. The window on the second portion displays different views of the first portion based on their relative rotational positions, creating segmented visual states that indicate tampering.
Solution Approach 2:
The locking mechanism is pre-configured to irreversibly lock the two portions in a second relative relation after the first rotation. This preliminary locking action prevents any subsequent reversal, ensuring the tamper-evident state cannot be restored.
2Reliability
If a closure system allows rotation to create a gap for tamper-evidence, then visual indication of opening is provided, but the parts can be rotated back to their original positions
Solution Approach 1:
The locking mechanism creates an asymmetric constraint that allows rotation in only one direction (first direction) while preventing rotation in the reverse direction. This asymmetric design ensures the closure can be opened to show the tamper-evident state but cannot be closed back to its original appearance.
Solution Approach 2:
The locking mechanism is designed to engage and lock the two portions in the second relative relation during the first rotation, performing the locking action preliminarily before any attempt at reversal. This ensures the visual indication is established and then permanently secured.
3Reliability
If a closure uses a distortable portion that changes appearance upon opening, then tamper-evidence is provided, but the distortion may not be sufficiently irreversible
Solution Approach 1:
The closure transitions from a static appearance to a dynamic visual change through rotation. The window displays different views of the first portion based on the rotational position of the second portion, creating a dynamic tamper-evident indication that is inherently irreversible due to the locking mechanism.
Solution Approach 2:
The first portion includes a first zone with a first appearance and a second zone with a second appearance that differs from the first. As the second portion rotates and the window shifts position, the visible color or appearance changes from the first zone to the second zone, providing clear visual tamper-evidence.
Data Source
AI summary
A tamper-evident closure (101) comprises a first portion (105, 106) and a second portion (102, 104) comprising a window (103) through which a view of the first portion (105, 106) is visible. The second portion (102, 104) is rotated relative to the first portion (105, 106) upon first opening of the tamper-evident closure (101), from a first position in which the first and second portions (105, 106; 102, 104) are in a first relative relation and a first view of the first portion (105, 106) is visible through the window (103), to a second position in which the first and second portions (105, 106; 102, 104) are in a second relative relation and a second, different view of the first portion (105, 106) is visible through the window (103). A locking mechanism irreversibly locks the first and second portions (105, 106; 102, 104) in the second relative relation.