Tamper-Evident Packaging Case With Integrated Locking Tab
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Solution Overview
Problem
Existing packaging cases with tamper-evident features often require additional manufacturing steps and materials, increasing costs and labor, while also facing difficulties in re-closing after initial opening and are prone to manipulation that compromises the integrity of the packaging.
Innovation Solution
A packaging case design featuring a pre-cut blank with hinged panels and locking mechanisms, including a folding closure flap with a locking tab that can be inserted between panels, allowing for secure closure and tamper evidence without damaging the case, and preventing manipulations that could alter the opening indicator function.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a transparent plastic sheet envelope is used to prevent opening, then the integrity of contents is guaranteed, but the manufacturing cost and labor increase substantially
Solution Approach 1:
The locking means are integrated directly into the cardboard blank structure itself, merging the packaging case and tamper-evident locking mechanism into a single unified structure. This eliminates the need for separate plastic envelope layers while maintaining integrity guarantee through the inherent locking edges and zones of weaker resistance in the cardboard construction.
Solution Approach 2:
The cardboard blank serves multiple functions simultaneously: it forms the packaging case structure, provides the locking mechanism through integrated locking edges, and includes tamper-evident zones of weaker resistance. This multi-functionality replaces the need for separate dedicated tamper-evident envelope components.
2Reliability
If locking means with stop surfaces are used to prevent fraudulent opening, then the integrity of contents is guaranteed, but the case cannot be easily re-closed after opening
Solution Approach 1:
The locking mechanism is designed to be dynamically reversible. The locking edge can engage with the stop surface to prevent opening, but can also be disengaged and re-engaged for re-closure. The zone of weaker resistance provides a controlled failure mode that maintains integrity evidence while allowing legitimate re-closure operations.
3Reliability
If stop surfaces are placed on closing flaps to prevent opening, then tamper evidence is provided, but the closing flaps become vulnerable to manipulation and deformation
Solution Approach 1:
The locking mechanism uses localized zones of weaker resistance strategically positioned in the cardboard structure, rather than relying on the structural integrity of the closing flaps themselves. This concentrates the tamper-evident function in specific vulnerable zones while preserving the strength of the closing flaps for their primary closure function.
Data Source
Figure 1~4
Figure 2
Figure 5
AI summary
The case has a tubular envelope with articulated panels (2-5) equipped with two ends, where one of the ends is opened. A closing panel (13) is articulated on the articulated panel. A cutting (38) is arranged in a locking flap (17) to form a locking strip (36) that is mounted in a swiveling manner on the locking flap around two fastener zones (37) of less resistance. The locking strip is intercalated by its swiveling. The locking strip is detached partially or completely from the locking flap by its blocking on a blocking edge (33) of a folding shutter (30). An independent claim is also included for a precut blank.