Zipper Assembly Lever Action Reduces Opening Force
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Solution Overview
Problem
Existing zipper assemblies for reclosable enclosures face challenges with misalignment during sealing, leading to increased force requirements for opening, which can result in damage to the enclosure.
Innovation Solution
The zipper assembly features opposing profiles with intermeshing elements, where the thicker portions of the supporting elements are coupled with the enclosure panels, and the thinner portions are not, creating a lever action that reduces the opening force required.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the interface area of the zipper assembly sealed to the panels is increased, then alignment between the sealing device and the zipper assemblies becomes easier, but the force required to open the zipper assembly increases
Solution Approach 1:
The supporting element is segmented into two distinct regions: a thicker portion that is sealed to the panel and a thinner portion that remains unsealed. This segmentation allows the sealing interface to be localized to only the thicker portion, improving alignment ease while reducing the total sealed area to prevent excessive opening force
Solution Approach 2:
Different portions of the supporting element are given different thicknesses to serve different functions. The thicker portion provides a robust sealing surface for alignment, while the thinner portion reduces the overall sealed interface area, thereby resolving the contradiction between alignment ease and opening force
2Length of moving object
If the zipper assembly is made narrower, then the enclosure becomes more compact, but alignment during sealing becomes more difficult
Solution Approach 1:
The supporting element is divided into thicker and thinner portions, with the thicker portion serving as the dedicated sealing interface. This allows the zipper assembly to remain narrow for compactness while the localized thicker portion provides sufficient alignment surface area for accurate sealing
Solution Approach 2:
Instead of increasing the width (horizontal dimension) of the zipper assembly to improve alignment, the solution transitions to the thickness dimension by creating a thicker portion of the supporting element. This vertical dimension change provides the needed alignment surface without compromising the narrow width of the overall assembly
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
This design enhances alignment during sealing and reduces the force needed to open the zipper assembly, preventing damage to the enclosure and improving user accessibility.
Implementation Method 1
the thicker portions of the supporting elements are coupled with the enclosure panels, and the thinner portions are not, creating a lever action that reduces the opening force required
Data Source
AI summary
A zipper assembly for a reclosable enclosure includes a first profile having a first elongated supporting element and first protruding intermeshing elements. The zipper assembly also may include a second profile having a second elongated supporting element and one or more second intermeshing elements protruding from the second elongated supporting element. The one or more first intermeshing elements may releasably interlock with the one or more second intermeshing elements to close the enclosure. Each of the first elongated supporting element and the second elongated supporting element may include a thicker portion and a thinner portion. The thicker portions of the first elongated supporting element and the second elongated supporting element may be coupled with one or more panels of the enclosure. The thicker portions of the first elongated supporting element and the second elongated supporting element may be disposed on a consumer side of the enclosure.