Magnetic Sliding Device for Faster Racket String Under-Threading
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Solution Overview
Problem
The manual process of threading horizontal strings under vertical strings in racket stringing is laborious and time-consuming, requiring high concentration and skill, especially when passing the string underneath.
Innovation Solution
A device with a sliding unit and fixed element using magnets and electromagnets to automate the up-and-down motion of horizontal strings, allowing them to be passed underneath vertical strings effortlessly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual threading of horizontal strings under vertical strings is used, then the stringing process can be completed, but the process becomes laborious and time-consuming
Solution Approach 1:
The patent replaces the manual mechanical threading operation with an automated mechanical system. The threading device includes a needle mechanism that automatically passes the horizontal string under the vertical string through controlled mechanical motion, eliminating the need for manual finger manipulation and significantly reducing the time and effort required for each threading operation.
Solution Approach 2:
The device enables self-service by allowing the horizontal string to thread itself under the vertical string through the automated needle mechanism. The system performs the threading action without requiring constant human intervention or skillful manual manipulation, making the process more accessible to operators with varying levels of expertise.
2Device complexity
If manual threading process is used, then the equipment remains simple, but the required concentration and skill level increases
Solution Approach 1:
The patent substitutes the complex manual skill requirement with a standardized mechanical system. The automated needle mechanism performs the precise threading motion that previously required skilled manual manipulation, thereby reducing the skill and concentration level needed while introducing controlled mechanical complexity to the device itself.
3Productivity
If automated threading device is introduced, then stringing time is reduced, but the device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the threading function into distinct modular components: a needle mechanism for passing the string, a mounting system for securing the device to the racket, and a control system for actuating the needle motion. This modular segmentation allows the automated function to be added without completely redesigning the entire stringing system, thereby limiting the increase in overall device complexity.
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
Significantly reduces stringing time, lowers the required concentration level, and makes the process more accessible to a wider audience by simplifying the threading process.
Implementation Method 1
The device is placed on the aforementioned strings, alternating simultaneously between two modes. These two modes, by means of a magnetic force, will pass the horizontal string underneath the vertical one without difficulty.
Implementation Method 2
The fixed element comprises magnets or electromagnets on both sides of the second rail, which have the function of attracting or repelling the magnets within the sliding unit.
Data Source
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Figure 5~6
AI summary
The invention relates to a device for stringing rackets that comprises a sliding element (3) intended to be joined to a horizontal string (1) that is passed under a vertical string (2), wherein the sliding element (3) in turn comprises a support comprising an attachable section and a hooking element (7), intended to hold the horizontal string (1), at least one first magnet (5), with positive and negative polarity, and a fixed element (8) to which the sliding element (3) is movably attached. The fixed element (8) comprises a first track (84) intended to receive the vertical string (2), a second track (85) with a first and second end, perpendicular to the first track (84), having a shallower depth than the first track (84) and with an attachable section along which the attachable section (42) of the sliding element (3) slides, and second magnets (9) arranged close to the first and second ends of the second track (85) of the fixed element (8), where at least one first magnet (5) of the sliding element (3) can interact with it.