Slider Pull Tab with Stop Member for Finger Protection
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Solution Overview
Problem
The existing slide fasteners with pull tabs can cause finger pricking and damage when the claw is exposed, and they lack sufficient strength to withstand bending or twisting forces.
Innovation Solution
A slider for slide fasteners with a pull tab that rotates between a first and second posture, featuring a stop member to limit the pull tab's erect position, ensuring the claw is within a protection space and a window with a rod for enhanced strength, preventing the claw from contacting fingers and improving the pull tab's durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the pull tab is allowed to rotate freely to an erect posture, then the slider can be operated to open or close the fastener, but the exposed claw may prick the wearer's fingers
Solution Approach 1:
A cover member is introduced as an intermediary component between the claw and the wearer's fingers. This cover member rotates together with the pull tab and claw, but its front end remains positioned ahead of the claw to prevent direct contact with fingers, thus mediating the harmful interaction while preserving operational functionality
Solution Approach 2:
The protective function is segmented from the operational function by separating the cover member from the pull tab structure. The cover member independently performs the protective function while the pull tab performs the operational function, allowing both to rotate together without interfering with each other's primary purposes
2Ease of manufacture
If the pull tab structure is simplified, then manufacturing cost is reduced, but the pull tab lacks sufficient strength to withstand bending or twisting forces
Solution Approach 1:
The pull tab is constructed using composite materials, specifically combining a base material with reinforcing elements. This composite structure provides enhanced strength and rigidity to withstand bending and twisting forces during operation, while maintaining reasonable manufacturing complexity through the use of integrated molding or attachment processes
3Ease of operation
If the claw is kept exposed for easy engagement with elements, then the fastener can be operated smoothly, but the claw causes harmful contact with fingers
Solution Approach 1:
The cover member is designed to dynamically follow the rotation of the pull tab and claw, maintaining its protective position throughout the entire range of motion. As the pull tab rotates to engage or disengage elements, the cover member rotates accordingly, continuously shielding the claw from finger contact while allowing full operational movement
Data Source
AI summary
There is provided a slider for slide fastener, including a slider body and a pull tab. A pair of supporting parts rotatably supporting the pull tab are provided on an upper surface of the slider body, and a claw for snapping elements of the slide fastener is provided on the pull tab. The pull tab is rotatable between a first posture in which the pull tab is placed down on the slider body and a second posture in which the pull tab is erected from the slider body. A stop member is provided on at least one of the slider body and the pull tab. The stop member limits the pull tab in an erect position of the second posture such that a front end of the claw is located within a protection space.