Child-Proof Container Locking With Notched Overlap Zones
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Solution Overview
Problem
Existing child-resistant packages are either complex and easily bypassed or lack sufficient security for preventing children under 5 from opening them, while being difficult for adults to open.
Innovation Solution
A child-proof container design featuring a closure system and storage unit with movable coupling portions, including notches and constraining portions that engage to lock the container, allowing easy adult opening but preventing child access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a through-access is provided on the side wall to allow external opening, then the package can be opened from outside, but the locking system can be easily bypassed and child safety is compromised
Solution Approach 1:
The patent introduces an intermediate mechanism where the pull tab acts as a mediator between the user and the locking system. The pull tab is connected to the locking mechanism through a concealed linkage that is not accessible through any through-access openings. This allows external operation while maintaining security, as the force is transmitted through the intermediate structure rather than direct access to locking components.
Solution Approach 2:
The patent moves the opening mechanism from a two-dimensional side wall access to a three-dimensional top surface access. The pull tab extends from the top surface of the package, creating a new access dimension that is not accessible to children who cannot reach the top. This dimensional change maintains ease of operation for adults while preventing child access.
2Reliability
If a complex locking system is used to prevent child access, then child safety is improved, but the device complexity increases and it becomes difficult for adults to open
Solution Approach 1:
The locking system is designed to be self-servicing through the pull tab mechanism. The tab automatically engages with the locking components when pulled, and the locking system self-latches without requiring complex multi-step operations. This reduces device complexity while maintaining high reliability, as the system serves itself through simple user interaction.
Solution Approach 2:
The locking system is segmented into distinct functional components: the pull tab, the linkage mechanism, and the latching components. Each segment performs a specific function, allowing the overall system to be simple yet effective. The segmentation enables easy manufacturing and assembly while maintaining child safety and adult accessibility.
3Device complexity
If a simple locking system is used, then device complexity is reduced, but the package cannot provide adequate security against children under 5
Solution Approach 1:
The patent changes the operational parameters of the locking system by using a pull force mechanism rather than twist or push operations. The pull tab requires a specific force parameter that is beyond the capability of children under 5 but easily achievable by adults. This parameter change maintains simplicity while ensuring adequate security.
Solution Approach 2:
The locking system employs asymmetric design where the pull tab and its linkage are positioned and oriented to be easily accessible to adults but inaccessible to children. The asymmetric placement of the tab extension from the top surface creates a functional difference based on user size and dexterity, achieving child safety without increasing complexity.
4Strength
If the container structure is made compact and resistant, then safety and portability are improved, but manufacturing complexity may increase
Solution Approach 1:
The patent merges the closure system and the container body into an integrated structure where the locking mechanism is formed as part of the container walls rather than as separate components. This merging reduces the number of parts and simplifies manufacturing processes while maintaining compactness and resistance. The coupling portions are integrated into the sheet material forming the container.
Solution Approach 2:
The container structure is designed with multi-functional elements that serve both structural and locking functions. The coupling portions and constraining portions are integrated into the container walls, allowing the same structural elements to provide both mechanical strength and locking functionality. This universality reduces manufacturing complexity by eliminating separate components.
Data Source
AI summary
A child-proof container including storage to be closed by a closure system. The container includes a first coupling portion carried by the closure system and a second coupling portion carried by the storage and configured to cooperate with said first coupling portion for locking the container in a closed condition. At least one of the sheet materials of the storage and the closure system includes a bonded and/or adhesively bonded overlap zone at which a plurality of notches are defined to define breaking portions of the overlap zone.