Child-Resistant Latch Tab Lever Action for Seal Release
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Solution Overview
Problem
Existing child-resistant storage cases often require adult dexterity or strength, making them difficult for small children and individuals with disabilities to open, while also being challenging for senior citizens due to complex or counter-intuitive mechanisms.
Innovation Solution
A latch mechanism that requires simultaneous inward and upward pivoting of a latch tab to open the storage case, utilizing a lever arm action to deform seals and reduce the force needed for opening, incorporating a latch tab with a protruding catch and a peripheral seal bead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a latch mechanism requires simultaneous inward and downward forces while lifting the lid, then child-resistance is improved, but ease of operation for seniors and persons with disabilities deteriorates
Solution Approach 1:
The patent inverts the conventional latch operation by requiring an upward and inward motion instead of downward and inward. This inversion makes the latch intuitive for seniors and persons with limited hand strength while maintaining child-resistance through the dual-directional force requirement
Solution Approach 2:
The patent changes the directional parameters of the latch operation from downward-inward to upward-inward. This parameter change transforms the force application geometry to better suit users with limited hand strength while preserving security through the coordinated dual-directional action
2Reliability
If multiple latches with wide spacing are used, then child-resistance is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple latch functions into a single integrated latch tab that requires coordinated upward and inward motion. This consolidation maintains child-resistance through the complex dual-directional operation while reducing device complexity by eliminating the need for multiple separate latches
Solution Approach 2:
The single latch tab performs multiple functions: it provides the primary mechanical latch, engages the seal bead, and requires dual-directional force application. This multi-functionality achieves child-resistance without the complexity of multiple separate latch mechanisms
3Reliability
If a latch mechanism requires greater dexterity and hand strength, then child-resistance is improved, but ease of operation for persons with disabilities deteriorates
Solution Approach 1:
By inverting the conventional downward latch motion to an upward motion, the patent makes the operation more accessible to persons with disabilities while maintaining security through the coordinated dual-directional force requirement that remains challenging for children
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 mechanism effectively prevents children from opening the case while being accessible to adults and individuals with limited strength, ensuring a balance between security and usability.
Implementation Method 1
The latch tab acts as a lever arm to locally deform the adjacent portions of the lid and seal, and thereby more easily release the seal when the latch tab is pressed upward
Implementation Method 2
The latch tab acts as a lever arm to locally deform the adjacent portions of the lid and seal
Data Source
AI summary
A latch mechanism for a child-resistant storage case has a seal bead between the lid and body of the storage case. The latch mechanism includes a latch tab extending downward from the lid that must be simultaneously pivoted inward and pressed upward to release the lid. The latch tab acts as a lever arm to locally deform the adjacent portions of the lid and seal, and thereby more easily release the seal when the latch tab is pressed upward.