Racket Head Internal Fence Vibration Absorption
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Solution Overview
Problem
Conventional shock absorbing structures for rackets in ball sports are not effectively fixed, leading to instability and inadequate reduction of vibration during ball impact, potentially causing injuries and affecting handling due to increased weight and altered center of gravity.
Innovation Solution
A shock absorbing structure featuring a hollow tubular absorption member made of materials like Thermoplastic Elastomer or Hydrogel, which mates with the internal fence of the racket head, providing secure attachment and enhanced vibration absorption by differing in amplitude from the head material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If external shock absorbers are hung on the racket frame, then vibration reduction is attempted, but the shock absorbers cannot be firmly fixed and are easy to fall due to shock
Solution Approach 1:
The absorption member is placed inside the racket head, nested within the internal fence structure. This internal placement ensures the absorption member cannot fall off during use, while still providing vibration absorption functionality. The absorption member is positioned within the hollow space of the racket head, surrounded by the internal fence on all sides.
Solution Approach 2:
The internal fence acts as an intermediary structure that secures the absorption member in place. The absorption member contacts with the internal fence, which serves as a mediator to hold the absorption member firmly within the racket head without requiring additional external fixing mechanisms.
2Object-affected harmful factors
If external shock absorbers are added to the racket, then vibration absorption is attempted, but the racket weight increases and center of gravity changes
Solution Approach 1:
The absorption member is nested inside the existing hollow space of the racket head, utilizing the internal volume without adding external components. This placement minimizes the increase in overall racket weight while still providing effective vibration absorption. The absorption member is positioned within the internal fence, making use of the existing structural space.
Solution Approach 2:
The absorption member is positioned locally within the racket head where vibration and impact forces are most intense. By placing the absorption member at this specific location (within the internal fence of the head), the vibration absorption effect is maximized at the source of impact, reducing the overall weight requirement compared to distributed external shock absorbers.
3Object-affected harmful factors
If conventional shock absorbers are used, then some vibration reduction is achieved, but the effect is not satisfactory and cannot effectively reduce powerful impact force
Solution Approach 1:
The absorption member is made from elastomeric materials that combine viscoelastic properties for vibration damping with high strength characteristics for impact resistance. These materials provide both vibration absorption and powerful impact force reduction simultaneously, overcoming the limitation of conventional shock absorbers that could only address one aspect.
Solution Approach 2:
The absorption member is positioned within the internal fence of the racket head, placing it at the optimal location to absorb impact forces before they propagate through the racket structure. This internal positioning allows the absorption member to directly counteract the impact force at its source, providing more effective protection compared to external shock absorbers.
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 effectively reduces vibration and enhances the racket's stability by securely attaching the absorption member to the internal fence, improving handling and reducing the risk of injury by absorbing impact forces more effectively than conventional methods.
Implementation Method 1
When the head and the absorption member are made of different materials, an amplitude of the head is different from an amplitude of the absorption member, and the head interferes the absorption member, thus absorbing vibration.
Data Source
AI summary
A shock absorbing structure of a racket contains: a head and an absorption member matingly contacting with an internal fence of the head. The absorption member is a hollowly tubular structure and covers the internal fence totally. When the head is made of carbon-fiber composite material, the absorption member is made of any one of Thermoplastic Elastomer (TPE), Thermoplastic Rubber (TPR), rubber, Hydrogel, and Thermoplastic Polyurethane (TPU). When the head is made of metal or aluminum alloy, the absorption member is made of any one of Thermosetting Elastomers, Thermoplastic Elastomer (TPE), Thermoplastic Rubber (TPR), rubber, Hydrogel, and Thermoplastic Polyurethane (TPU). When the head and the absorption member are made of different materials, an amplitude of the head is different from an amplitude of the absorption member, and the head interferes the absorption member, thus absorbing vibration.