Slide Fastener Fin Structure to Hide Exposed Tape
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Solution Overview
Problem
Existing slide fasteners are prone to exposing the fastener tape between the fastener elements and the fastener-receiving member, compromising design aesthetics and external appearance quality when attached to products like garments or bags.
Innovation Solution
A slide fastener design featuring a slider with a Y-shaped element guide passage and fin portions on the fastener elements that allow the fastener tape to be hidden, combined with a U-shaped stringer attachment edge portion secured by a sewing thread to prevent exposure, while ensuring smooth slider operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sewing-machine needle is caused to reciprocate at a position away from the fastener elements to pierce the fastener tape, then the sewing process can be completed without damaging the fastener elements, but the fastener tape is exposed to the outside between the fastener elements and the fastener-receiving member, compromising design aesthetics
Solution Approach 1:
The invention extracts the fastener tape from the visible area by making it recessed relative to the fastener elements. The fastener tape is positioned in a groove or recess so that only the fastener elements protrude outward, hiding the tape behind them. This allows the sewing to occur on the tape without exposing it, as the tape is effectively removed from the external surface.
Solution Approach 2:
The invention transitions the fastener tape from a two-dimensional surface element to a three-dimensional recessed structure. By creating a groove or recess in the fastener stringer that houses the tape, the solution adds a depth dimension, allowing the tape to be positioned below the plane of the fastener elements while maintaining structural integrity and aesthetic appearance.
2Object-affected harmful factors
If the fastener tape is made waterproof and moisture-permeable, then liquid infiltration is suppressed, but the tape structure becomes more complex with a thin tape body and core string portion
Solution Approach 1:
The invention uses a composite structure consisting of a thin tape body and a core string portion. The tape body provides the waterproof barrier while the core string portion provides structural support and rigidity. This composite design allows the tape to be both waterproof and structurally sound without requiring excessive thickness or complexity in a single material.
Solution Approach 2:
The fastener tape is segmented into two functional parts: a thin tape body for waterproofing and a core string portion for structural support. This segmentation allows each component to be optimized for its specific function - the tape body can be made thin and flexible for water resistance, while the core string provides the necessary strength and stiffness.
Data Source
AI summary
A slide fastener with which a slide fastener-attached product capable of preventing or suppressing exposure of a fastener tape can be manufactured is provided. The slide fastener includes fastener stringers and a slider, in which each of fastener elements includes an element base portion and a fin portion extending from the element base portion toward a tape inner side of a fastener tape and having a smaller dimension in a tape thickness direction than the element base portion, in which, at a shoulder-port-side end portion of a slider body, a leading end portion of the fin portion of each of the fastener elements is positioned on the outer side of the slider body with respect to an inner wall surface of a flange, and in which the ratio of a total fin width to an element maximum width is less than 40%.