Slide Fastener Slider With Offset Pull Tab Attachment
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Solution Overview
Problem
The complexity of the double structure in existing slide fasteners increases manufacturing costs and makes it difficult to easily separate one fastener stringer from a slider.
Innovation Solution
A slide fastener design with a simple structure featuring a slider with parallel upper and lower blades, a guide post, flanges, and a pull tab attachment portion offset from the centerline, allowing easy separation of fastener stringers with a lateral pulling force, and a stopper claw to prevent damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a double structure consisting of inner plate and outer plate is used in the upper blade, then the fastener stringer can be separated from the slider, but the construction becomes complicated and manufacturing cost increases
Solution Approach 1:
The invention extracts the essential function of separation from the complex double-plate structure and implements it through a simpler mechanism. The pull tab attachment portion is positioned to allow the fastener stringer to be separated from the slider by lateral pulling force without requiring an inner plate and outer plate structure, thus achieving the separation function with reduced construction complexity
Solution Approach 2:
The pull tab attachment portion is disposed asymmetrically at one side with respect to the centerline of the guide post in the width direction. This asymmetric positioning creates a structural imbalance that facilitates easy separation of the fastener stringer when lateral pulling force is applied, while maintaining overall structural integrity
2Ease of manufacture
If a simple structure is used, then manufacturing cost is reduced, but it becomes difficult to separate one fastener stringer from the slider
Solution Approach 1:
By positioning the pull tab attachment portion asymmetrically at one side with respect to the centerline of the guide post, the structure achieves easy separation functionality without requiring complex components. This asymmetric design creates a natural separation path that allows the fastener stringer to be easily detached when lateral force is applied, maintaining simplicity while enabling the required operation
Solution Approach 2:
The structure allows dynamic separation of the fastener stringer from the slider through lateral pulling force. The pull tab attachment portion's positioning enables the fastener stringer to move laterally and separate from the slider body when force is applied, providing the necessary operational flexibility without adding structural complexity
Data Source
AI summary
There is provided a slide fastener that includes a pair of fastener stringers provided with fastener element rows having a plurality of fastener elements along opposing tape-side edges of a pair of fastener tapes, and a slider slidably attached to the fastener element rows to engage and disengage the fastener elements. One of the fastener stringers is separated from the slider when a lateral pulling force directed outward in a width direction of the fastener tapes is applied to the pair of fastener stringers. A pull tab attachment portion provided on an upper surface of an upper blade of the slider is disposed at one side with respect to a centerline of a guide post in the width direction.