Rotating Fastener Slider Assembly With Multi-Point Fit Sections
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Solution Overview
Problem
Existing slider designs for slide fasteners face challenges in attaching to non-sewn fastener chains with adhesive layers and in replacing sliders after sewing, as they experience high sliding resistance and are prone to separation.
Innovation Solution
A slider design featuring a first member with an upper and lower blade, a guide post, and a connecting post, along with a second member that rotates around a fulcrum, incorporating multiple fit sections distributed along the length and width for stable attachment and reduced sliding resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a slider with two separated members is attached to fastener chains sewed or adhered to fabric, then the slider can be attached to non-sewn fastener chains with adhesive layers and can be replaced after sewing, but sliding resistance becomes relatively large and the two members are likely to be separated
Solution Approach 1:
The slider is divided into two separated members (first member and second member) that can be independently attached to fastener chains, enabling attachment to non-sewn chains with adhesive layers and facilitating replacement after sewing. The first member includes an upper blade, lower blade, guide post, and connecting post, while the second member includes a first arm and second arm that rotate relative to each other around a fulcrum.
Solution Approach 2:
The first member and second member are connected through multiple fitting portions (first fitting portion, second fitting portion, third fitting portion) that engage with corresponding counter-fitting portions, creating a unified structure that resists separation. The flange on the second member provides additional connection points, merging the two members into a stable assembly that functions as a single slider unit.
2Ease of operation
If a slider with two separated members rotating around a fulcrum is used, then the slider can open or close elements of the fastener chains, but sliding resistance increases making it difficult to slide
Solution Approach 1:
The second member is designed to rotate dynamically around a fulcrum (pivot shaft) relative to the first member, enabling the slider to open and close elements of the fastener chains. This rotational movement provides the mechanical action needed for element engagement and disengagement while maintaining relatively low sliding resistance through the fulcrum mechanism.
Solution Approach 2:
The fulcrum mechanism introduces rotational movement in a different dimension (angular rotation around the pivot shaft) rather than purely linear sliding. This dimensional change allows the slider to perform element opening/closing functions through rotation while reducing the sliding resistance that would be encountered with purely linear motion.
3Device complexity
If only one fitting point (pivot shaft) is provided between two slider members, then the structure is simple, but the members are likely to be separated under sliding resistance
Solution Approach 1:
The connection between the first member and second member is segmented into multiple discrete fitting portions distributed at different locations: first fitting portion and second fitting portion near the fulcrum for rotational connection, and third fitting portion at the end portion for additional stability. This segmentation provides multiple independent connection points that collectively prevent separation.
Solution Approach 2:
The fitting portions are distributed in both the length direction and width direction of the slider, creating a two-dimensional distribution pattern rather than a single-point connection. This spatial distribution in multiple dimensions provides redundant connection paths that resist separation forces from various directions.
Data Source
AI summary
A slider for a slide fastener in which the slider is attached to fastener chains is provided. The slider includes a first member and a second member. The first member includes an upper blade, a lower blade, a guide post connected between the upper blade and the lower blade, and a connecting post protruding from the upper blade. The second member includes a first arm and a second arm separated from each other, is attached to the first member by the first arm and the second arm, and is configured to rotate along an upper-lower direction relative to the first member and around a fulcrum provided on the upper blade or the lower blade. The first member or the second member is provided with a flange. Three or more fit sections are formed between the first member and the second member.