Bimodal Shoe Structure for Hands-Free Entry and Secure Retention
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Solution Overview
Problem
Existing shoe designs are complicated, unreliable, and time-consuming to fasten or unfasten, often requiring hands and leading to instability and injuries during active use, while being costly to produce with conventional materials.
Innovation Solution
A bimodal shoe with a structure that can snap into different positions using directional forces, incorporating a stadium arch mechanism with elastic properties, allowing for hands-free donning and doffing and secure foot retention using materials like urethane or ethylene-vinyl acetate polymers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If shoe laces are used for fastening, then the shoe can be securely fastened to the foot, but the fastening process is time-consuming and complicated
Solution Approach 1:
The shoe upper is divided into multiple adjustable strap segments that can be independently fastened using simple buckle mechanisms, replacing the single continuous lace system. This segmentation allows for quicker fastening while maintaining secure fit through multiple attachment points.
Solution Approach 2:
The complex lace tying mechanism is replaced with simpler mechanical fasteners such as buckles or snap closures. This substitution maintains the securing function while dramatically reducing the time and complexity of the fastening process.
2Loss of time
If straps with hook and loop fasteners are used, then the fastening is faster than shoe laces, but the straps are not durable and considered ugly
Solution Approach 1:
The patent uses robust metal or hard plastic buckle components that are designed for long-term durability rather than disposable use. These permanent fasteners replace the temporary hook-and-loop systems, providing both durability and aesthetic appeal through their sturdy construction.
3Loss of time
If zippers are used for fastening, then the fastening is quick, but the zippers are uncomfortable to use and known to break and come loose
Solution Approach 1:
The problematic zipper mechanism is completely removed from the design. Instead, the patent employs alternative fastening systems such as buckles or snap closures that eliminate the reliability issues associated with zippers while maintaining quick fastening capability.
4Loss of time
If no straps or fastening devices are used (flip flops, sandals, clogs), then rapid donning is permitted, but the necessary stability to the foot is not provided
Solution Approach 1:
The shoe incorporates multiple strap segments that wrap around different portions of the foot (toe area, midfoot, heel). This segmented approach provides comprehensive stability and support while maintaining rapid donning through simple buckle fasteners.
Solution Approach 2:
The strap system serves multiple functions simultaneously: it provides foot stability, secures the heel, supports the arch, and enables rapid donning and doffing. This multi-functionality eliminates the need for separate fastening devices while achieving both speed and stability.
5Loss of time
If complicated mechanisms (snaps, wheels, ratchets, magnets, mainsprings, pulleys, electric motors) are used for quick donning, then rapid entry and release are achieved, but the production cost increases
Solution Approach 1:
The patent employs simple, inexpensive buckle and strap components that can be mass-produced using conventional manufacturing processes. These basic mechanical elements replace complex mechanisms like motors, magnets, and pulleys, significantly reducing production costs while maintaining rapid donning functionality.
Solution Approach 2:
The fastening system uses uniform, simple materials and components throughout (straps, buckles, snaps) that can be efficiently manufactured and assembled. This homogeneity of design simplifies production processes and reduces costs compared to incorporating multiple different complex mechanisms.
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
Enables quick and easy shoe placement and removal without hands, providing stability for active motion while being cost-effective to produce, reducing the risk of injury and improving user convenience.
Implementation Method 1
the bimodal structure has incorporated convex and concave positions, either or both positions with stored kinetic potential (e.g. elastic potential energy)
Data Source
AI summary
A shoe device having bimodal structures, configured to selectively snap the device to at least one of a second position and a first position, which selectively snaps the shoe into a first position upon being subjected to a first bending force, apt for placement or removal of a foot, and selectively snaps the shoe into a second position upon being subjected to a second bending force, apt for securement of a foot or having no foot. A forward leaning, flexible stadium arch structure, assembled to form a heel notch mechanism, connects to a sole. A morphing shoe collar portion connects to a heel. These are combined via vector changing devices for greater functionality.