Child Safety Zipper Segmented Coupling Mechanism
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Solution Overview
Problem
Existing plastic bags with zipper structures fail to effectively prevent children from opening them, even with double- or triple-coupling zippers or separate safety locks, which can be inconvenient and costly.
Innovation Solution
A child safety zipper system comprising two interlocking zipper strips with specific design features, including band units, connection units, base units, hook units, and support units, that maintain a sealed state when stretched and require twisting to uncouple, preventing accidental opening by children.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a double- or triple-coupling zipper structure is applied to the plastic bag, then the sealing force is improved, but the zipper can still be easily opened by children
Solution Approach 1:
The zipper is divided into multiple functional segments: band units for attachment, connection units for linking, base units for structural support, hook units for coupling, and support units for reinforcement. This segmentation allows each component to perform its specific function optimally, creating a zipper that is both strong and child-resistant
Solution Approach 2:
The zipper combines multiple structural elements (band units, connection units, base units, hook units, and support units) into a composite structure that integrates sealing functionality with child safety features, achieving both strong coupling and resistance to child-induced opening
2Reliability
If a separate safety lock device is added to the plastic bag, then child safety is improved, but the device complexity and cost increase
Solution Approach 1:
The child safety function is merged with the zipper structure itself. The hook units and base units form an integrated coupling mechanism that provides both sealing and child safety features, eliminating the need for separate safety lock devices and reducing overall structural complexity
Solution Approach 2:
The zipper structure serves multiple functions simultaneously: the band units attach to the bag, the connection units link the zipper strips, the base units provide structural support, the hook units enable coupling, and the support units reinforce the structure. This multi-functionality integrates safety features into the existing zipper without adding separate components
Data Source
AI summary
A child safety zipper includes a first zipper strip that is attached to an inside wall on one side of a plastic bag and a second zipper strip that is attached to an inside wall on the other side of the plastic bag and is coupled to the first zipper strip to seal the plastic bag.