Slider Guide Pillar Groove for Fastener Friction Reduction
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Solution Overview
Problem
Conventional fasteners experience friction and damage due to the interaction between the fastener tape and the slider's guide pillar, especially when a waterproof layer is present, leading to impaired sliding performance.
Innovation Solution
The slider design includes a first groove on the guide pillar's side surface and a gap between the blades' inner surfaces, reducing friction by allowing the fastener tape to pass through these features, and a tab pull installing lug for improved sliding resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a waterproof layer is disposed on the surface of the fastener tape, then the waterproof performance is improved, but the sliding resistance increases and smooth operation is impaired
Solution Approach 1:
The patent introduces a guide pillar as an intermediary component between the fastener tape and the slider body. The guide pillar guides the fastener tape through a controlled path, preventing direct contact between the waterproof layer and the slider's internal structures, thereby reducing friction while maintaining waterproof integrity
Solution Approach 2:
The slider is divided into functional segments: the guide pillar handles the guidance function, while the blade structures handle the sliding function. This segmentation allows each component to be optimized independently - the guide pillar protects the waterproof layer from damage while the blades provide smooth sliding motion
2Reliability
If the fastener tape is made thicker by adding a waterproof layer, then the waterproof performance is improved, but the sliding resistance increases
Solution Approach 1:
The guide pillar acts as a mediator that supports the thicker fastener tape with the waterproof layer, distributing the contact forces and reducing the friction between the tape and slider components. This allows the tape to maintain its thickness for waterproofing without proportionally increasing sliding resistance
3Stability of the object's composition
If the inner edge of the fastener tape contacts the guide pillar side during sliding, then the guidance function is achieved, but friction causes damage to the fastener tape
Solution Approach 1:
The guide pillar is designed with specific local characteristics - a rounded or flattened contact surface at the guiding edge and a smoother surface at the sliding interface. This local quality differentiation allows the guide pillar to provide stable guidance while minimizing friction and damage to the fastener tape during the sliding operation
Data Source
AI summary
A slider includes a lower blade, an upper blade, a guide pillar, and a pair of flanges. The flanges are respectively disposed on lateral edges of one of the lower blade and the upper blade, and the inner surface of another one of the lower blade and the upper blade and the end surface of the flanges are opposite to each other and separated by a gap. A first groove is provided on a side surface of the guide pillar and corresponds to the gap. A fastener includes a pair of fastener stringers and the slider. The fastener stringers include a fastener tape and an element column coil. A boundary between the first groove and the side surface of the guide pillar forms a step portion, and the step portion is located between the fastener tape and the element column coil.