Slider Closure Part Nested Engagement for Fastener Gap

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Solution Overview

Problem

Existing slider fasteners face issues with the ease of attachment and detachment of closure parts, which can lead to impaired functionality due to unwanted deformation and foreign object entrapment in gaps between the pull tab attachment post and the slider body.

Innovation Solution

A slider design incorporating a closure part with an upper engaging portion and a leg portion that extends along the coupling post, allowing for secure attachment and detachment without deformation, ensuring the closure part remains attached to the slider body.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the closure part is made relatively small to close the gap, then the gap closing function is improved, but the ease of attachment deteriorates

Engineering Contradiction:

Improvegap closing functionVSAvoidease of attachment

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The closure part is designed with a nested structure where the closure body houses the leg portion that extends along the coupling post. The engaging protrusion fits into the engaging hole, creating a nested engagement mechanism that secures the closure part to the slider body while maintaining compact dimensions for effective gap closing.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Ease of operation

If the closure part is made simple to attach, then the ease of attachment is improved, but the detachment resistance deteriorates

Engineering Contradiction:

Improveease of attachmentVSAvoiddetachment resistance

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The closure part is segmented into distinct functional components: the closure body for gap closing, the leg portion for positioning along the coupling post, and the engaging protrusion for secure attachment. This segmentation allows each component to perform its specific function optimally while maintaining overall simplicity of the attachment mechanism.

Inventive Principle:

Principle #1Segmentation

3Length of stationary object

If the pull tab attachment post is deformed to minimize the gap, then the gap size is reduced, but the slider body deformation deteriorates

Engineering Contradiction:

Improvegap sizeVSAvoidslider body deformation

Core Design Contradiction:

Length of stationary objectVSStability of the object's composition

Solution Approach 1:

The closure part acts as an intermediary element that closes the gap between the pull tab attachment post and the upper blade without requiring deformation of the slider body. The leg portion of the closure part extends along the coupling post to position the closure body precisely, eliminating the need for post deformation while maintaining gap closure.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS10212992B2Slider for slide fastener

Publication Date: 2019.02.26 YKK CORP

AI summary

A slider for slide fasteners may include a slider body and a closure part. The closure part may include a closure portion for closing the gap between a free end portion of a pull tab attachment post and an upper blade; an upper engaging portion provided above the closure portion and engageable with the free end portion of the pull tab attachment post and a leg portion provided below the closure portion. The leg portion may include a rod portion extending from the closure portion along the coupling post and a lower engaging portion coupled to the rod portion and engageable with a lower blade.