Concealed Slider Guide Column Aligns Fastener Elements
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Solution Overview
Problem
Concealed slide fasteners face issues with smooth operation under large transverse pulling forces, leading to fastener element damage and misalignment, as existing solutions do not effectively stabilize the fastener element's transition from a vertical to a horizontal posture during sliding.
Innovation Solution
A slider design with a Y-shaped tape guide passage and dual element guide sections, where the element rear end section is guided first to apply rotational moment, ensuring the fastener element is smoothly inclined into a horizontal posture, preventing damage and misalignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a concealed slide fastener is used to improve design appearance, then the slider body is not exposed to the outside, but large transverse pulling force causes the fastener element to stand up vertically, leading to misalignment and operational failure
Solution Approach 1:
The patent applies preliminary action by providing a guide column and guide passage that pre-align the fastener element before it enters the slider. The guide column extends into the shoulder opening and the guide passage guides the fastener element's longitudinal direction, ensuring proper alignment is established in advance before the element engages with the slider blades, preventing the vertical standing up issue under transverse force
Solution Approach 2:
The patent uses the guide column and guide passage as intermediary structures between the fastener element and the slider blades. These intermediary components mediate the transition of the fastener element from a vertical to horizontal posture, gradually guiding it into the correct alignment position rather than allowing direct engagement that would cause misalignment
2Force
If large transverse pulling force is applied to close the fastener, then the fastener stringer is pulled taut, but the fastener element stands up vertically and becomes sandwiched between tape guides, preventing slider movement
Solution Approach 1:
The guide column and guide passage provide preliminary alignment action before the fastener element is subjected to the full transverse pulling force. By establishing the horizontal orientation in advance through the guide structures, the system prevents the element from standing up vertically when the pulling force is applied, ensuring smooth slider movement
Solution Approach 2:
The guide passage acts as a cushioning structure that absorbs and manages the transverse pulling force during the alignment process. The guide passage allows the fastener element to gradually transition into position while distributing the stress, preventing the sudden vertical standing up that would otherwise occur under direct transverse force
3Stability of the object's composition
If the fastener element is introduced from the shoulder opening while stood up vertically, then the element may be inclined horizontally, but the small angle prevents proper introduction and the element gets sandwiched by tape guides
Solution Approach 1:
The guide column provides preliminary alignment by extending into the shoulder opening and establishing the correct horizontal orientation of the fastener element before it is introduced into the slider. This pre-alignment ensures the element is properly positioned and angled, preventing it from getting sandwiched by the tape guides during introduction
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 enables smooth sliding and accurate engagement of fastener elements even under large transverse forces, preventing damage and ensuring correct alignment, thus enhancing the reliability of concealed slide fasteners.
Implementation Method 1
the coupling head of the fastener element is guided in sliding contact by the guide column and the first element guide section
Implementation Method 2
the element rear end section is guided in sliding contact by the second element guide section
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
Provided is a slider for a concealed slide fastener that can be made compact and smoothly slide even if large transverse pulling force is applied when a slide fastener is closed. A fastener element (13) standing-up is inclined in a horizontal state, by bringing an element rear end section (13b) of the fastener element (13) in sliding contact with a pair of second element guide sections (8) extending toward a rear opening (17) from a front end edge (2a) of a lower blade (2). The fastener element (13) is also in sliding contact with a first element guide section (7) disposed on the outer periphery of a guide column (5), such that the fastener element (13) becomes in a more horizontal state.