Child-Resistant Zipper With Segmented Adhesion Bands
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Solution Overview
Problem
Conventional child-resistant zippers for packaging bags are either difficult to open and close, especially when enhanced for security, or they fail to prevent opening by children, leading to inconvenience in use and potential tampering.
Innovation Solution
A child-resistant zipper design featuring adhesion band members with specific fit-engagement portions and a releasing mechanism that allows easy opening by predetermined procedures while preventing accidental opening by children, even under heavy loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the fit-engagement strength of the zipper is enhanced to prevent opening by children, then the child-resistant function is improved, but the zipper becomes difficult to open and close requiring additional time and effort
Solution Approach 1:
The adhesion band member is divided into two distinct functional regions: a first adhesion region with strong adhesive force for securing the zipper to the bag, and a second adhesion region with weaker adhesive force that allows easy release. This segmentation enables the zipper to provide both strong child-resistant function and easy operability by allowing different regions to serve different purposes.
Solution Approach 2:
Different portions of the adhesion band member are given different adhesive properties. The first adhesion region (where the seal is applied) has strong adhesion to prevent child access, while the second adhesion region (near the releasing member) has weak adhesion that facilitates easy release by users. This local differentiation of adhesive strength resolves the contradiction between security and ease of use.
2Reliability
If the fit-engagement strength is enhanced to prevent inadvertent opening when the bag contains heavy objects, then the reliability is improved, but the zipper becomes difficult to open requiring additional time and effort
Solution Approach 1:
The adhesion band member is segmented into a first adhesion region for strong bonding that prevents inadvertent opening under heavy loads, and a second adhesion region for easy release. This allows the zipper to maintain reliability under load while remaining easy to operate when needed.
Solution Approach 2:
The adhesive strength is locally differentiated across the adhesion band member, with the first region providing strong attachment to prevent accidental opening from heavy contents, and the second region providing weak attachment that allows easy manual release. This local quality variation resolves the contradiction between preventing inadvertent opening and maintaining ease of operation.
3Reliability
If a seal is applied along the zipper to prevent opening while sold, then the security is improved, but the zipper becomes difficult to open requiring additional time and effort
Solution Approach 1:
The adhesion band member is segmented into a first adhesion region that receives the seal for security during sale, and a second adhesion region that allows easy release. This segmentation enables the seal to provide strong protection during storage and sale while the second region facilitates easy opening by authorized users.
Solution Approach 2:
Different regions of the adhesion band member have different adhesive strengths: the first region (under the seal) has strong adhesion to prevent opening during sale, while the second region has weak adhesion for easy release. This local differentiation of adhesive properties resolves the contradiction between security during sale and ease of 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 zipper effectively prevents opening by children without requiring excessive strength or effort, while allowing easy access through predetermined procedures, maintaining usability and security across various applications.
Implementation Method 1
first and second adhesion band members (1) respectively adhered to inner opposing surfaces of an opening (P2) of a packaging bag
Data Source
AI summary
A child-resistant zipper is provided and a packaging bag incorporating such a zipper which is difficult for a child to open, but which can readily be opened using predetermined procedures. The zipper comprises first and second adhesion band members each comprising an upper and lower surface on upper and lower ends thereof, one surface of which is an adhesive surface for adherence to opposing inner surfaces of an opening of a packaging bag, and a fit-engagement body comprising first and second fit-engagement portions respectively provided on opposing surfaces of the adhesion band members, wherein the first and second fit-engagement portions are adapted to releasably engage with each other to form a fit-engagement body, wherein the adhesive surface of the first adhesion band member is provided on its lower surface to form a lower surface adhering fit-engagement body in which the fit-engagement portion of the first band adhesion member is arranged along the upper end of the first adhesion band member, and wherein a releasing member is provided on the upper end of the first adhesion band member of the lower surface adhering fit-engagement body which is adapted to release engagement of the fit-engagement body when the releasing member and the second adhesion band member are opened in opposite directions.