Two-Segment Flexible Package Lock for Child-Resistant Access
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Solution Overview
Problem
Existing packages lack effective locking mechanisms that prevent unauthorized access by children and the elderly, particularly those requiring complex motions involving different forces in different directions.
Innovation Solution
A package design featuring a flexible member with a first and second segment connected by an elbow, where the second segment extends away from the first due to a spring force, allowing the lid to be locked and unlocked through specific directional forces applied to contact structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a simple locking mechanism is used, then ease of operation is improved, but child resistance is worsened
Solution Approach 1:
The locking mechanism is divided into multiple functional segments: a first segment that rotates in a first direction to engage the locking arm, and a second segment that rotates in a second direction to disengage it. This segmentation allows the lock to require complex multi-directional manipulation while maintaining clear operational steps for authorized users.
Solution Approach 2:
The opening mechanism inverts the typical locking action by requiring rotation in opposite directions: closing involves rotating the first segment in a first direction to lock, while opening requires rotating the second segment in a second direction to unlock. This inversion creates intuitive operation for adults while preventing accidental or unauthorized opening by children.
2Reliability
If a complex locking mechanism requiring multiple forces in different directions is implemented, then child resistance is improved, but device complexity is worsened
Solution Approach 1:
Multiple locking functions are merged into a single integrated locking arm that engages with both the first and second segments simultaneously. This consolidation achieves complex child-resistant functionality without proportionally increasing the number of separate components, as the locking arm serves multiple engagement points within a unified structure.
Solution Approach 2:
The locking arm serves multiple functions: it engages with the first segment during closing, engages with the second segment during opening, and provides both security and operational feedback. This multi-functionality reduces the need for separate components for each function, thereby limiting overall device complexity while maintaining high child resistance.
3Reliability
If a locking mechanism with multiple engagement points is used, then reliability is improved, but ease of manufacture is worsened
Solution Approach 1:
The locking arm is constructed as a flexible component capable of elastic deformation, allowing it to engage and disengage from multiple segments through controlled flexing rather than rigid mechanical movements. This flexibility simplifies manufacturing compared to rigid multi-component systems, as the flexible arm can be formed as a single piece with integrated engagement features that naturally provide the required reliability.
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 design provides enhanced child-resistant and elderly-resistant access control, meeting regulatory standards for complex motion requirements and reducing the risk of unintended substance exposure.
Implementation Method 1
the second segment extends in an outward direction, away from the first segment due to a spring force from the elbow
Implementation Method 2
the elbow is made from a resilient material, the elbow providing a spring force that causes the second segment to extend away from the first segment
Data Source
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AI summary
The package includes a base, a primary lid connected to the base, the primary lid and the base defining a primary storage area, and a locking mechanism. The locking mechanism includes a flexible member including a first segment and a second segment that are connected by an elbow, the first segment being connected to the primary lid, a distal end of the second segment including at least one contact structure, the flexible member including at least one first engaging structure between the elbow and a front surface of the at least one contact structure, and a second engaging structure on a first wall of the base. The container includes a receptacle wall cooperating with a peripheral wall to define a receptacle, and a flexible tab projecting from the top wall, the flexible tab including a fixed end adjacent to the top wall and a free end opposite the fixed end.