Flexible Toe Cap for Controlled Ball Spin and Tripping Prevention
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Solution Overview
Problem
Traditional sports shoes are ineffective in imparting spin to a ball when kicked with the toe end due to the smaller contact area and rigidity of the toe cap, which limits control and accuracy in kicking techniques.
Innovation Solution
A flexible toe cap that changes shape orthogonally to the direction of the kicked ball, increasing the contact area and then snapping back to its original shape to provide controlled spin, while also reducing shoe length to prevent tripping during running.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the toe cap is made rigid to maintain structural integrity, then the shoe provides stability and protection, but the contact area with the ball remains small and spin control is poor
Solution Approach 1:
The toe cap transitions from a static rigid structure to a dynamic flexible structure that can change its shape during the kicking motion. The flexibility allows the toe cap to deform and increase contact area with the ball during impact, while the material properties ensure it returns to its original shape, maintaining structural integrity over multiple uses.
2Area of stationary object
If the toe cap is made flexible to increase contact area, then spin control improves, but the structural integrity and protection are reduced
Solution Approach 1:
The invention changes the physical parameters of the toe cap material, specifically its flexibility and elastic properties. By selecting materials with appropriate elastic moduli and damping characteristics, the toe cap can deform sufficiently to increase contact area while maintaining enough structural integrity to provide protection and return to its original shape after deformation.
3Productivity
If the shoe length is extended to improve kicking leverage, then spin imparting capability increases, but the risk of tripping during running increases
Solution Approach 1:
The shoe incorporates dynamic elements that allow the effective length to change during different phases of motion. During running, the flexible toe cap and shoe structure collapse or flex to reduce the projected length, preventing tripping. During kicking, the structure extends to provide maximum leverage and spin imparting capability.
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
Enhances the accuracy and spin imparted to the ball by increasing the contact area during kicking and allowing the shoe to return to its original shape while still in contact with the ball, providing additional spin and preventing tripping hazards.
Implementation Method 1
a flexible toe cap, which is engineered to substantially change shape in a direction roughly orthogonal to the direction of a kicked sports ball
Implementation Method 2
the flexible toe cap is able to, after initial change of shape as a result of a reaction force from a kicked ball, snap back to the substantially original shape of the flexible toe cap while still in contact with a kicked ball
Implementation Method 3
such spin causes a Magnus effect thereby causing a ball to curve away from the principal direction of flight
Data Source
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AI summary
An article of sports footwear that changes shape in two ways. Firstly, a change of shape occurs when such footwear is used to kick a ball with the toes. This change of shape maximizes the area of contact with a ball that is kicked with the toes. Secondly, a change of shape occurs when the article of sports footwear bends during running. This change of shape shortens the entire length of the article of sports footwear in order to prevent tripping. A flexible toe cap encases the foot and parts of a traditional article of footwear and attaches at or near the tarsometatarsal joint of a wearer.