Child-Resistant Package Locking Tabs Using Paperboard Memory
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Solution Overview
Problem
Current child-resistant packaging solutions fail to effectively prevent children from opening packages while allowing adults to access the contents, as they often lack robust locking mechanisms that can withstand repeated use and meet stringent safety standards.
Innovation Solution
A child-resistant package design featuring an inner tray with hingedly coupled locking tabs and an outer sleeve with aligned locking slots, utilizing memory properties in paper-based materials like corrugated paperboard to securely engage and disengage the tray, requiring simultaneous force application to unlock, thereby preventing unauthorized access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional locking mechanisms are used in child-resistant packaging, then the package can be opened by adults, but children can also open the package
Solution Approach 1:
The locking tab utilizes the memory property parameter of paperboard material, transforming it from a static structural element to a dynamic locking component. By changing the physical state of the paperboard through folding and bending, the locking mechanism achieves both child resistance and adult accessibility without complex mechanical parts
Solution Approach 2:
The locking tab automatically engages with the locking slot through its own elastic recovery, without requiring separate locking actions. The paperboard's memory property enables the locking tab to self-lock when folded into the slot and self-unlock when sufficient force is applied, making the system self-servicing
2Reliability
If robust locking mechanisms are implemented to prevent children from opening, then child-resistant effectiveness improves, but the device complexity increases
Solution Approach 1:
The invention extracts the locking function from complex mechanical systems and embeds it directly into the paperboard material itself through its memory property. The locking tab is simply a folded portion of the paperboard, eliminating the need for separate springs, latches, or mechanical components
Solution Approach 2:
The locking mechanism is made homogeneous with the package structure - both the locking tab and the slot are formed from the same paperboard material. This eliminates material incompatibility issues and simplifies manufacturing by using a single material type throughout
3Device complexity
If simple locking mechanisms are used, then device complexity is reduced, but the locking mechanism cannot withstand repeated use
Solution Approach 1:
The locking mechanism is designed to be dynamic rather than static. The locking tab can repeatedly transition between locked and unlocked states through folding and unfolding actions. The memory property of the paperboard enables it to return to its original shape after each cycle, accommodating repeated use without degradation
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 achieves 100% child-resistant effectiveness, meeting safety standards by ensuring that children cannot open the package, while adults, including seniors, can easily access the contents, and maintains durability through repeated use.
Implementation Method 1
The locking tabs may comprise memory properties to allow the locking tabs to releasably engage the locking slots when the inner tray engages the outer sleeve
Data Source
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AI summary
A child-resistant package is disclosed comprising an inner tray, an outer sleeve, and a locking system. The locking system may comprise at least one locking tab, at least one locking slot for each locking tab, and an engagement point. The locking slots may be positioned on opposite sides of the outer sleeve and may be aligned with the locking tabs when the inner tray is slideably engaged with the outer sleeve such that the locking tabs engage the locking slots.