Spiral Zipper Mountaineering Boot Gaiter Design
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Solution Overview
Problem
High-altitude mountaineering boots with zippers extending along the gaiter suffer from structural damage due to repeated bending and stretching, leading to water penetration and difficulties in putting on and fastening, while alternative curved zipper designs exacerbate wear and complicate usage.
Innovation Solution
A mountaineering boot with a spiral-shaped watertight zipper along the gaiter, starting behind the front portion and ending at the top of the bootleg, following a helical trajectory that maintains a larger radius of curvature, reducing wear and allowing easier access and faster donning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the watertight zipper extends along the front of the gaiter from the instep to the top, then the boot is easier to put on and fasten, but the zipper is repeatedly subjected to bending and stretching that causes structural damage
Solution Approach 1:
The zipper is configured to follow a curved path that goes around the ankle rather than straight along the front. This curved arrangement reduces the bending and stretching stress on the zipper during walking, while still allowing the zipper to open fully for easy boot donning and doffing.
2Reliability
If the watertight zipper follows a curved path along the outer side and up the bootleg, then the structural damage is reduced, but the boot becomes much harder to put on and fasten
Solution Approach 1:
The zipper follows a curved path that optimally balances structural integrity with ease of operation. The curve radius is specifically designed to be large enough to minimize stress on the zipper while still allowing full opening for boot access.
3Shape
If the watertight zipper has a small radius of curvature at the malleolus, then the zipper fits the boot contour better, but it becomes difficult to run the slider and causes irregular local wear
Solution Approach 1:
The zipper path is designed with an optimized radius of curvature at the malleolus region. This radius is large enough to allow smooth slider movement and distribute wear evenly, while still conforming to the boot's anatomical contour.
Data Source
Figure 1~2
Figure 3
AI summary
A mountaineering boot (1) having : a vamp (2) designed to accommodate the user's foot and ankle, roughly up to calf height; a sole (3) unmovably fixed to the bottom of the vamp (2) to cover the underside of the user's foot; a substantially sock-shaped outer gaiter (11) which completely covers the vamp (2) grazing the outer surface of the vamp (2) up to the top of the bootleg (6) of the vamp (2); and a zipper (12) which extends along the gaiter (11) to allow the user to open the gaiter (11) for access to the vamp (2) underneath, following a substantially spiral-shaped, curved path which begins behind the front portion (13) of the gaiter (11), and ends at the upper mouth (21) of the bootleg (17) of the gaiter (11), after following, in the end stretch, a substantially helical trajectory about the axis of the bootleg (A) that crosses the rear part of the bootleg (17) of the gaiter (11).