Fastener Stop Structure for Snap-Sensing Slider Position
Solution Overview
Problem
Users face difficulty in determining if the fastener stop structure has fully entered the element channel of the slider, leading to potential unexpected displacement during operation.
Innovation Solution
A fastener stop structure with a protruding portion on the inner lateral surface of the first stop portion, which is larger than the element channel, allowing the guiding post of the slider to generate a snapping feeling and prevent unexpected displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple fastener stop structure is used, then the device complexity is reduced, but the user cannot sense the relative position during slider operation, leading to unexpected displacement
Solution Approach 1:
The protruding portion is added only to the first stop portion's inner lateral surface, creating a localized sensing feature rather than redesigning the entire fastener stop structure. This localized modification provides position sensing capability while keeping the overall structure simple and avoiding complete redesign
Solution Approach 2:
The protruding portion acts as an intermediary element between the fastener stop structure and the slider's guiding post. It mediates the interaction by providing a tactile interface that allows the guiding post to sense position through snapping engagement, bridging the gap between simple structure and reliable position indication
2Reliability
If the fastener stop structure is made larger in width, then the slider can be better constrained, but the element channel size must be increased, affecting compactness
Solution Approach 1:
The width increase is applied only locally to the first stop portion where the protruding portion is disposed, rather than increasing the width of the entire fastener stop structure or element channel. This localized dimensional change provides the necessary constraint while minimizing impact on overall compactness
Solution Approach 2:
The fastener stop structure is segmented into functional zones: the first stop portion with the protruding portion that provides sensing and constraint, and the second stop portion that provides stopping function. This segmentation allows the element channel to maintain its original size while achieving better slider constraint through the specialized first stop portion
Data Source
AI summary
A fastener stop structure includes a first stop portion and a second stop portion. An inner lateral surface of the first stop portion facing the second stop portion is provided with a protruding portion. A size of a portion of the first stop portion where the protruding portion is disposed in a width direction is greater than a size of an element channel of the slider used in a fastener chain in the width direction, and the protruding portion is disposed at a distance from a front end edge of the first stop portion in a length direction. The fastener includes the fastener chain, the slider, and the fastener stop structure. When the slider slides on a pair of element columns along the length direction, the first stop portion and the second stop portion of the fastener stop structure are able to enter the pair of element channels.