Waterproof Boot Ankle Expansion Mechanism for Snug Fit
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Solution Overview
Problem
Waterproof industrial safety boots suffer from excessive foot motion and instability due to excess width at the ankle, leading to muscle overwork and discomfort, and fail to provide a secure fit for varying ankle sizes, increasing the risk of slipping and falling, as well as blisters and back problems.
Innovation Solution
A waterproof boot with an expansion mechanism in the ankle region, featuring a pocket for a selectively removable insert that can be tailored to fit individual ankle dimensions, combined with a zip mechanism or stretchable material, to ensure a snug and secure fit, and an adjustable inner sleeve to prevent water and debris entry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the ankle region of the boot is made with fixed width for a given foot size, then the boot structure is simple and easy to manufacture, but the boot cannot accommodate different ankle sizes resulting in poor fit
Solution Approach 1:
The ankle region is segmented into a fixed upper structure and a removable insert component. The insert can be exchanged to accommodate different ankle sizes, allowing the boot to adapt to various wearers while keeping the main boot structure simple and easy to manufacture.
Solution Approach 2:
The boot transitions from a static fixed-width ankle region to a dynamic configuration where the insert can be added or removed based on the wearer's ankle size, enabling the structure to adapt to different conditions without increasing overall complexity.
2Reliability
If the boot has excess width at the ankle region, then the boot is easy to manufacture and allows easy foot insertion, but the foot slips up and down causing excessive foot motion and instability
Solution Approach 1:
The ankle region is divided into a fixed upper structure and a removable insert. The insert provides the necessary width adjustment to eliminate foot slippage, while the simple upper structure remains easy to manufacture. The insert acts as a separate component that can be added to achieve proper fit without complicating the main boot manufacturing process.
3Adaptability or versatility
If the boot is made with fixed ankle width, then the manufacturing process is simple, but the boot is too tight for wearers with large ankles and too loose for wearers with small ankles
Solution Approach 1:
The boot is segmented into a universal fixed upper and size-specific removable inserts. This allows a single boot design to serve multiple ankle sizes by simply exchanging the insert component, maintaining manufacturing simplicity while achieving high adaptability.
Solution Approach 2:
The fixed upper structure serves as a universal component that can accommodate different ankle sizes through the use of interchangeable inserts. This multi-functional design allows one boot model to serve multiple purposes and fit various wearers without requiring multiple boot variants.
4Object-affected harmful factors
If the boot has wide leg opening for easy removal, then the boot is easy to put on and take off, but liquids and foreign bodies can enter through the leg opening causing discomfort and safety hazards
Solution Approach 1:
An intermediate closure mechanism is introduced at the leg opening to mediate between the need for easy removal and the need to prevent harmful factors. The closure allows quick opening and closing while effectively blocking water and debris when closed, maintaining both ease of operation and protection.
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 solution provides improved stability and comfort by minimizing foot movement, accommodating different ankle sizes, and preventing water and debris ingress, resulting in reduced fatigue, increased safety, and enhanced gait efficiency.
Implementation Method 1
an expansion mechanism provided in the upper adapted to allow the internal circumference of the upper to expand in the ankle region
Implementation Method 2
the translational friction between the insert and the pocket is sufficient to substantially prevent movement of the insert in the pocket during use
Data Source
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AI summary
A waterproof boot (10) is provided that has a waterproof upper (14), having a foot portion (16), a leg portion (20) and an ankle region (18) located between the foot portion (16) and the leg portion (20). A pocket (30) Is provided in the upper (14) at an anterior aspect of the ankle region (IS), An expansion mechanism (24) is provided In the upper (14) and is adapted to allow the upper (14) to expand in the ankle region (18). A selectively removable Insert (32) is also provided that Is adapted to snugly fit within the pocket (30).