Badminton Racket Shaft with Segmented Solid and Hollow Regions
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Solution Overview
Problem
Existing badminton rackets lack the ability to adjust weight and balance point without altering the frame or grip structure, limiting the degree of freedom in customization.
Innovation Solution
The badminton racket features a shaft with alternating solid and hollow regions, allowing for adjustment of weight and balance point by varying the length and position of these regions, which are embedded within the grip and extend along the shaft, enabling adjustments without changing the frame or grip structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the frame structure is altered to adjust weight and balance point, then weight and balance point are adjustable, but the frame structure becomes complex
Solution Approach 1:
The shaft is divided into multiple sections along its extending direction, with each section containing either solid or hollow regions. This segmentation allows independent adjustment of weight distribution without modifying the frame structure, resolving the contradiction between adjustability and structural simplicity
Solution Approach 2:
Instead of adjusting weight and balance point by modifying the frame structure (two-dimensional adjustment), the invention moves the adjustment mechanism to the shaft's longitudinal dimension by varying solid and hollow region distributions, thereby achieving weight adjustment without frame complexity
2Speed
If the shaft diameter is reduced to enhance swing-through performance, then air resistance decreases, but bending rigidity is compromised
Solution Approach 1:
The shaft incorporates solid regions at specific locations (particularly near the kick point) while maintaining hollow regions elsewhere. This local quality variation allows the shaft to have reduced overall diameter for lower air resistance while maintaining sufficient bending rigidity at critical areas through localized solid structure
Solution Approach 2:
The shaft employs a composite structure combining solid and hollow regions, creating a hybrid design that optimizes both aerodynamic performance and structural integrity. The solid regions provide necessary rigidity while hollow regions reduce weight and air resistance
Data Source
Figure 1
Figure 2A~2B
AI summary
To enhance a degree of freedom in adjusting a weight and a balance point. A racket (10) according to the present invention includes: a frame (13) extending in an annular shape; a grip (11); and a shaft (12) which extends and connects the grip and the frame each other. The shaft is formed to have hollow regions (23, 24) in a shaft body (22) except for a coupling portion, at which the shaft is coupled to the frame, and to have a solid region (25) which is arranged with the at least one hollow region in an extending direction. It is possible to adjust the weight and the balance point of the entire racket by changing the lengths and the positions of the solid region and the hollow regions in the extending direction of the shaft body.