Child-Resistant Molded-Fiber Container Locking Mechanism
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Solution Overview
Problem
Existing child-resistant container mechanisms are often complex, non-compostable, and not suitable for molded-fiber materials, making them costly, difficult to recycle, and environmentally unfriendly.
Innovation Solution
A child-resistant molded-fiber container design featuring a molded-fiber base and lid with a flexible locking member and hinge, utilizing friction and a simple locking mechanism to secure the container in a closed configuration, made from biodegradable materials like wheat straw or sugarcane, which is inexpensive to manufacture and compostable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional locking mechanisms are used to prevent child access, then security is improved, but device complexity increases and child-resistance is not achieved
Solution Approach 1:
The locking mechanism is segmented into two independent actions: (1) pushing the lid down to disengage the locking member from the tab, and (2) rotating the lid to open. This segmentation prevents children from opening the container by addressing each locking constraint separately, thereby improving child-resistance without requiring complex mechanisms.
Solution Approach 2:
The locking mechanism transitions from a static locked state to a dynamic unlocking process. The lid must undergo a sequence of dynamic movements (pushing down, then rotating) to open, making it difficult for children who cannot perform the coordinated actions. This dynamic approach enhances security while maintaining simple structural components.
2Reliability
If conventional locking mechanisms are used, then security is improved, but manufacturing cost increases and compostability is lost
Solution Approach 1:
The locking mechanism is merged with the lid and base structures themselves. The locking member is formed as an integrated part of the base, and the tab is formed as part of the lid, eliminating the need for separate locking components. This merging reduces manufacturing complexity and cost while maintaining compostability, as the entire container can be made from a single biodegradable material.
Solution Approach 2:
The container structure serves its own locking function through its geometry. The locking member and tab are self-contained features of the container itself, requiring no external locking components or additional materials. This self-service approach simplifies manufacturing and ensures the entire container remains compostable while providing adequate security.
3Strength
If the lid is fully enclosed, then structural integrity is improved, but ease of operation deteriorates
Solution Approach 1:
The user must perform a preliminary action of pushing the lid down to disengage the locking member before the lid can be rotated open. This preliminary action is built into the opening sequence, ensuring that the locking mechanism is properly disengaged before the lid is removed, thereby maintaining structural integrity while guiding the user through the correct operation.
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 provides a secure, child-resistant container that is environmentally friendly, inexpensive, and easy to recycle, while maintaining the integrity of the contents through a combination of friction and a flexible locking mechanism, ensuring secure storage and transport of items like food, medicine, and personal belongings.
Implementation Method 1
the interaction of the surface of the sidewall of the lid and the upper surface of the outer sidewall of the base have a coefficient of friction of 0.8 to 0.2
Data Source
AI summary
A child-resistant molded-fiber container includes a base, a lid, and a hinge. The base includes an upper surface and a lower surface. The upper surface defines a cavity and the lower surface defines a channel surrounding the cavity. The channel is disposed between an inner sidewall and an outer sidewall of the base. The outer sidewall includes a locking member. The lid includes a sidewall having an opening. The hinge rotatably connects the base and the lid, and allows rotation of the lid between an open configuration and a closed configuration relative to the base. In the closed configuration, the sidewall of the lid is disposed around the outer sidewall of the base and conceals the upper surface of the base. In the closed configuration, the locking member of the base extends through the opening of the lid to inhibit movement of the lid to the open configuration.