Refoldable Flap Insert for Child-Resistant Packaging
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Solution Overview
Problem
Existing child-resistant and senior-friendly packaging designs face issues with the loss of spring-back properties in locking mechanisms, leading to compromised security and increased package thickness, which affects the ease of use and security of unit dose products.
Innovation Solution
The design incorporates an insert with two refoldable flap portions extending over opposite surfaces of a base portion, allowing them to help each other maintain locking functionality even if one loses spring-back ability, and a sleeve with retaining means interacting with these flaps to enhance secure locking and centring within the package.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single locking flap is used in the insert, then the package structure is simple, but the locking security is compromised after repeated use due to loss of spring-back properties
Solution Approach 1:
The insert is divided into multiple independent locking flaps (first and second flap portions) that can function independently. Each flap has its own fold line and spring-back mechanism, so if one flap loses its spring-back properties after repeated use, the other flap continues to provide locking security, thereby resolving the contradiction between reliability and device complexity.
Solution Approach 2:
Different regions of the insert (opposite surfaces of the base portion) are equipped with separate locking flaps that have optimized local properties. The first flap portion is optimized for one direction of insertion while the second flap portion is optimized for the opposite direction, allowing each flap to maintain effective spring-back characteristics for its specific function.
2Reliability
If the package thickness is increased to maintain locking security, then the locking mechanism remains effective after repeated use, but the package size increases and ease of use is reduced
Solution Approach 1:
The locking function is segmented into multiple thin flaps rather than requiring a single thick locking mechanism. This allows the package to maintain security through multiple independent thin flaps that collectively provide the necessary spring-back properties without increasing overall package thickness, thus preserving ease of operation.
3Ease of operation
If the insert is designed to slide completely out of the sleeve, then ease of removal is improved, but child-resistant security is compromised
Solution Approach 1:
The locking system is segmented into multiple flaps that can be sequentially engaged or disengaged. The sleeve includes corresponding retaining means that interact with these flaps to create a multi-stage locking system, where complete removal requires overcoming multiple independent locking barriers, thereby maintaining child-resistant security while allowing controlled ease of removal for authorized users.
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
This configuration provides improved retaining functionality, maintaining security and ease of use by ensuring the locking mechanisms remain effective even after repeated use, while optimizing package structure for repeated bending without significant loss of spring-back properties.
Implementation Method 1
the first flap portion is refolded in relation to the base portion such that it extends backwardly over a first surface of the base portion, and the second flap portion is refolded in relation to the base portion such that it extends backwardly over a second surface, opposite the first surface, of the base portion
Data Source
AI summary
The disclosure relates to an insert adapted to be slidably received in a sleeve. The insert comprises a base portion, a first flap portion adapted to be refolded about a first fold line, a second flap portion adapted to be refolded about a second fold line, wherein the second fold line extends essentially in parallel with the first fold line, and wherein the first flap portion is refolded in relation to the base portion such that it extends backwardly over a first surface of the base portion, and the second flap portion is refolded in relation to the base portion such that it extends backwardly over a second surface, opposite the first surface, of the base portion. The disclosure also relates to a sleeve adapted to slidably receive such an insert and the thus formed package.