Separable Slide Fastener Pin Structure to Prevent Closure Idling
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Solution Overview
Problem
Slide fasteners with separation inserts experience idling issues during closure, leading to ineffective engagement due to the pivot support body rotating away from the insert body when the slider is pulled in the disengagement direction.
Innovation Solution
A slide fastener design featuring a retainer pin member and a separable pin member that are rotatably engageable, with an inclined protrusion on the retainer pin arm to guide the slider into an inclined position, and recesses on the half element to prevent idling by ensuring proper engagement and alignment of the pin members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a separation insert with rotatable pivot support body is used to enable opening/closing of the slide fastener, then the slide fastener can be opened and closed, but the pivot support body rotates away from the insert body when the slider is pulled in the disengagement direction, causing idling and ineffective engagement
Solution Approach 1:
The patent introduces a retainer arm as an intermediary component between the slider and the pivot support body. This retainer arm extends from the slider and engages with the pivot support body to prevent its rotation away from the insert body during closure operation, thereby eliminating the idling problem while maintaining the opening/closing functionality
Solution Approach 2:
The retainer arm is designed to preliminarily constrain the pivot support body in its engaged position before the closure operation is completed. By pre-preventing the rotation away, the system ensures that the engagement remains stable throughout the entire closure process, avoiding the idling issue that occurs in conventional designs
Data Source
AI summary
A slide fastener includes: a first slide fastener member and a second slide fastener member. The first slide fastener member includes a first cloth tape, a first element row, a slider, and a retainer pin member. The second slide fastener member includes a second cloth tape, a second element row, and a separable pin member. When the retainer pin member and the separable pin member are engaged with each other, a slider accommodating area is formed. An inclined protrusion is provided on a retainer pin arm. When the retainer pin member and the separable pin member are engaged with each other and the slider is located in the slider accommodating area and abuts against the retainer pin main body, the inclined protrusion abuts against an outer peripheral side of the slider and drives the slider to be inclined toward the separable pin member.