Explosion-Proof Zipper With Misaligned Tooth Gaps
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Solution Overview
Problem
Existing zippers lack both explosion-proof and puncture-resistant properties, as the alignment of inner and outer tooth rows makes them susceptible to piercing and bursting open when subjected to external pressure or sharp objects.
Innovation Solution
The zipper design includes two independent zippers with misaligned tooth gaps and a dual-layer slider, where one zipper's teeth are sewn to the tape on different sides, forming a T-shaped structure, enhancing puncture resistance and explosion-proof performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inner and outer tooth rows are sewn to the zipper tape by the same sewing line, then the zipper achieves explosion-proof performance, but the aligned tooth gaps make it vulnerable to piercing by sharp objects
Solution Approach 1:
The patent applies asymmetry by deliberately misaligning the tooth gaps of the inner and outer zipper tooth rows. The inner tooth row is shifted relative to the outer tooth row along the zipper tape, so that their gaps do not coincide. This asymmetric arrangement ensures that when one tooth row has a gap, the other tooth row provides coverage, preventing sharp objects from penetrating through both layers while maintaining explosion-proof integrity.
2Ease of manufacture
If a single-layer zipper structure is used, then the manufacturing process is simple, but the zipper lacks both explosion-proof and puncture-resistant properties
Solution Approach 1:
The patent applies segmentation by dividing the zipper into two independent functional layers: an outer zipper tooth row and an inner zipper tooth row, each with separate tooth sequences and gap patterns. These segmented layers are both attached to the same zipper tape but operate independently, providing dual protection mechanisms where the outer layer handles primary fastening and the inner layer provides additional security against piercing and explosion forces.
Solution Approach 2:
The patent implements nesting by placing the inner zipper tooth row within the structural envelope of the outer zipper tooth row. Both tooth rows are mounted on the same zipper tape, with the inner row positioned closer to the bag interior and the outer row facing outward. This nested configuration allows space optimization while providing layered security, where the inner row protects against internal piercing attempts and the outer row handles external forces.
3Device complexity
If the zipper tooth gaps are aligned in a straight line, then the zipper structure is simple and easy to manufacture, but sharp objects can easily pierce through the aligned gaps
Solution Approach 1:
The patent applies asymmetry by deliberately misaligning the tooth gaps of the inner and outer zipper tooth rows. The inner tooth row is shifted relative to the outer tooth row along the zipper tape, so that their gaps do not coincide. This asymmetric arrangement ensures that when one tooth row has a gap, the other tooth row provides coverage, preventing sharp objects from penetrating through both layers while maintaining explosion-proof integrity.
Data Source
AI summary
An explosion-proof zipper relating to the field of zipper technology is provided. The explosion-proof zipper includes a first zipper, a second zipper, a left extension tape, a right extension tape, and a slider. The first zipper includes a first left zipper tape, a first right zipper tape, a first left zipper tooth sewn to one end of the first left zipper tape, and a first right zipper tooth sewn to one end of the first right zipper tape. The second zipper includes a second left zipper tape, a second right zipper tape, a second left zipper tooth sewn to one end of the second left zipper tape, and a second right zipper tooth sewn to one end of the second right zipper tape.