Slider Pull-Tab Composite Metal Core Resin Posture
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Solution Overview
Problem
Existing sliders for slide fasteners lack a pull-tab that can maintain its own posture and provide a luxury feeling, particularly in designs where the pull-tab is made of resin and attached to a metal slider body and attachment portion.
Innovation Solution
A slider design featuring a pull-tab with a metal core and a resin portion covering the circumference, where the resin portion is in contact with the inner surface of the pull-tab attachment portion, allowing the pull-tab to maintain its posture while the metal components provide a luxury feel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pull-tab is made of resin and pivotally supported on the pull-tab attachment portion, then the pull-tab can maintain its own posture at multiple positions, but the luxury feeling is insufficient
Solution Approach 1:
The pull-tab is constructed as a composite structure with a metal core portion providing structural integrity and a resin outer layer providing aesthetic appearance. This composite design enables the pull-tab to maintain its posture through the metal core's rigidity while the resin coating delivers the desired luxury feeling and metallic appearance.
Solution Approach 2:
Different portions of the pull-tab have different material properties: the core portion uses metal for structural support and posture maintenance, while the outer surface uses resin for aesthetic purposes. This local differentiation of material quality allows simultaneous achievement of functional reliability and visual appeal.
2Ease of manufacture
If the pull-tab is made of metal to provide luxury feeling, then the aesthetic appearance is improved, but the ability to maintain posture at multiple positions is reduced
Solution Approach 1:
The pull-tab combines metal and resin materials in a composite structure where each material contributes its superior properties: metal provides rigidity for posture maintenance while resin provides aesthetic quality. This resolves the contradiction by having both materials work together rather than choosing one over the other.
Solution Approach 2:
The invention changes the material composition parameter of the pull-tab from a single material to a composite of two materials with different properties. This parameter change enables the pull-tab to simultaneously achieve the rigidity needed for posture maintenance and the aesthetic quality for luxury feeling.
3Reliability
If the resin portion width is equal to or smaller than the pull-tab attachment portion width, then the contact with inner circumferential surface is optimized for posture maintenance, but the structural complexity increases
Solution Approach 1:
The resin portion is designed with a specific width that matches or is smaller than the pull-tab attachment portion width, creating optimal local contact between the resin outer surface and the inner circumferential surface of the attachment portion. This localized dimensional matching enhances posture maintenance capability through improved contact geometry.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The slider effectively maintains the pull-tab's posture at multiple positions and imparts a luxury feel due to the metallic appearance, enhancing user experience and durability.
Implementation Method 1
at least a part of an outer circumferential surface of the resin portion is in contact with an inner circumferential surface of the pull-tab attachment portion
Implementation Method 2
the resin portion made of resin and covering at least a part of a circumference of the core portion
Data Source
AI summary
There is provided a slider for a slide fastener. A pull-tab attachment portion is provided on a slider body portion. A pull-tab is attached on the pull-tab attachment portion. The pull-tab has a handle portion and a connection portion connected to the pull-tab attachment portion. The connection portion includes a shaft portion and a pair of rod portions made of metal and extending from both ends of the shaft portion toward the handle portion. The shaft portion has a core portion made of metal and a resin portion made of resin and covering at least a part of a circumference of the core portion. At least a part of an outer circumferential surface of the resin portion is in contact with an inner circumferential surface of the pull-tab attachment portion.