Dual-Tension Racket Stringing Device for Symmetric Stiffness
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Solution Overview
Problem
Conventional racket stringing devices fail to achieve precise and symmetric tensioning of string segments, leading to inconsistencies in the stringbed stiffness profile, which affects a player's control and power during gameplay.
Innovation Solution
The use of a dual-tension racket stringing device with stationary dual-string clamps and a drop-weight gear dial with a rack and pinion configuration allows for simultaneous tensioning of string pairs and precise adjustment of the weighted component, ensuring equal tension across the stringbed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional single-string tensioning devices are used, then the device complexity is low, but the manufacturing precision of stringbed stiffness profile deteriorates
Solution Approach 1:
The tensioning device is divided into multiple independent tensioning mechanisms, with each mechanism dedicated to tensioning a specific string segment. This segmentation allows precise control over each string's tension independently, achieving uniform stringbed stiffness profile while keeping each individual tensioning mechanism relatively simple
Solution Approach 2:
Multiple tensioning mechanisms are merged into a single integrated device that can simultaneously tension multiple string segments. This combining approach improves manufacturing precision by enabling parallel tensioning operations while distributing the overall complexity across multiple coordinated subsystems
2Manufacturing precision
If string segments are tensioned sequentially, then the device complexity is low, but the manufacturing precision of tension uniformity deteriorates
Solution Approach 1:
Multiple tensioning mechanisms are merged into a single integrated device capable of simultaneous operation. This allows all string segments to be tensioned at the same time, ensuring uniform tension distribution across the stringbed while the shared structural framework manages the overall complexity
Solution Approach 2:
The integrated tensioning device performs multiple functions simultaneously - it can tension different string segments in parallel, adjust tension levels independently for each segment, and maintain uniformity across all segments. This multi-functionality achieves high precision tension uniformity while consolidating complexity into a single versatile system
3Measurement precision
If manual adjustment of weighted component is used, then the device complexity is low, but the measurement precision of tension adjustment deteriorates
Solution Approach 1:
The manual mechanical adjustment of the weighted component is replaced with a gear dial mechanism that provides finer, more precise control. The gear and pinion system transforms large rotational movements into small, precise adjustments of the weighted component position, achieving high tension adjustment accuracy while the modular gear mechanism keeps the added complexity manageable
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
This approach minimizes errors and inconsistencies in string tension, resulting in a more uniform and symmetric stringbed stiffness profile, enhancing player control and power by maintaining consistent tension throughout the stringing process.
Implementation Method 1
a drop-weight gear dial with a rack and pinion configuration allows for simultaneous tensioning of string pairs and precise adjustment of the weighted component
Implementation Method 2
drop-weight tensioning system
Data Source
AI summary
A dual tension racket string tensioning system and methods for implementing the same are disclosed. Embodiments of the disclosure include a tensioner equipped with two or more receptacles to releasably grip two or more portions of string simultaneously, and simultaneously apply a force at each portion of the string held in the receptacles. Embodiments of the present disclosure include a turntable rotatably coupled to a base structure, a mounting support adjustably coupled to the turntable (the mounting support configured to receive and hold a racket), and a dual tensioner, as disclosed herein, coupled with the base and operable to apply force (1) at a first portion of the string via the first receptacle; and (2) at a second portion of the string via the second receptacle. Some embodiments further include a stationary dual-string clamp. Further embodiments include a gear dial for fine tuning the force applied to the string portions. And still further embodiments employ a frequency meter to measure the frequency/pitch/tension of individual string segments throughout the stringing process.