Racket Multilayer Structure for Elastic Repulsion and Core Support
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Solution Overview
Problem
Conventional rackets, such as those used for pickle ball, suffer from insufficient repulsive force due to the inadequacy of the PE and EVA sponge layers, which do not effectively restore the elastic deformation during ball impact.
Innovation Solution
The racket design incorporates a core layer with higher stiffness than the inner and outer layers, combined with elastic inner layers that allow for enhanced deflection, and a honeycomb structure for increased rigidity, enhancing the repulsive force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If highly elastic units are provided in the racket base body, then the racket should have good repulsion, but the PE and EVA sponge layers have insufficient restitution and the racket is insufficiently repulsive
Solution Approach 1:
The patent employs a composite structure consisting of a highly elastic unit (such as rubber or foam material) combined with PE and EVA sponge layers. This composite material approach allows the highly elastic unit to provide the necessary restitution and repulsive force that the sponge layers alone cannot achieve, while the sponge layers provide additional cushioning and comfort.
Solution Approach 2:
The patent applies different material properties to different regions of the racket. The highly elastic unit is strategically positioned in specific areas (such as the core or impact zone) where maximum repulsive force is needed, while the sponge layers are applied in regions where cushioning is beneficial. This localized optimization of material properties resolves the contradiction between needing high restitution and providing adequate cushioning.
2Force
If the racket uses conventional sponge layers for cushioning, then comfort is provided, but the repulsive force is insufficient
Solution Approach 1:
The racket combines highly elastic materials (rubber, foam) with conventional PE and EVA sponge layers in a composite structure. The highly elastic unit provides the necessary repulsive force and restitution, while the sponge layers maintain the cushioning and comfort properties. This composite approach allows both high repulsion and comfort to coexist without compromising either property.
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 design improves the racket's repulsion and restitution by allowing the elastic layers to deflect more effectively, supported by a rigid core, resulting in improved performance.
Implementation Method 1
the first inner layer is an elastic body... the elastic layers to deflect more effectively
Implementation Method 2
The core layer has a higher stiffness than the first inner layer. The first outer layer has a higher stiffness than the first inner layer
Data Source
AI summary
A racket comprises a handle and a body connected to the handle. The body includes a core layer, a first surface layer, a first inner layer disposed so as to sandwich the first surface layer with the core layer, and a first outer layer disposed so as to sandwich the first inner layer with the first surface layer. The first inner layer is an elastic body. The first outer layer has a higher stiffness than the first inner layer. The core layer has a higher stiffness than the first inner layer.