Slide Fastener Intermediate Body Alignment
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Solution Overview
Problem
Existing slide fasteners with intermediate bodies often suffer from slider jamming, fluid leakage, and manufacturing difficulties due to alignment challenges of the tapes during the incorporation of the intermediate body.
Innovation Solution
A slide fastener design featuring first and second stringers with spaced coupling elements, an intermediate body interposing the stringers' edges, and sliders that interdigitate the coupling elements, along with a manufacturing method using dies to align and secure the tapes, forming the intermediate body with cavities and mounting projections to ensure correct positioning and attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an intermediate body is incorporated into the slide fastener, then the reliability of slider movement is improved, but the device complexity increases
Solution Approach 1:
An intermediate body is introduced as a mediating component between the first and second stringers. This intermediate body includes a first channel receiving the first stringer and a second channel receiving the second stringer, providing a structured interface that guides slider movement and prevents jamming while maintaining overall system functionality.
2Object-affected harmful factors
If the intermediate body is added to prevent fluid leakage, then the sealing performance is improved, but the manufacturing difficulty increases
Solution Approach 1:
The intermediate body integrates multiple functions into a single component: it provides fluid sealing between stringers, guides slider movement through configured channels, and structures the overall assembly. This merging of functions reduces the number of separate parts needed and simplifies the manufacturing process despite the added complexity of the intermediate body itself.
Data Source
AI summary
A slide fastener includes first and second stringers, an intermediate body, a first slider, and a second slider. The first and second stringers are separated by a first lateral distance in a first longitudinal portion, the first and second stringers are separated by a second lateral distance in a second longitudinal portion. A transition portion extending along at least a portion of a longitudinal extent of the intermediate body interposes the first and second longitudinal portions, and the second lateral distance is greater than the first lateral distance.