Grommet Strip with Offset Axes for Racket Stringing
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Solution Overview
Problem
Conventional rackets for ball games have fixed stringing configurations, limiting the ability to easily switch between different stringing patterns, which affects playability.
Innovation Solution
A grommet strip with offset grommet and hole axes, allowing for interchangeable stringing configurations by using different grommet strips or modifying the same strip, enabling various stringing patterns without altering the racket's bore arrangement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed bore arrangement in the racket head is used, then the racket structure remains simple and stable, but the stringing configuration cannot be easily varied
Solution Approach 1:
The grommet strip is segmented into multiple modular grommets, each capable of independent positioning. The grommets are arranged in groups (first, second, third groups) that can be selectively used to create different stringing patterns. This segmentation allows the same physical strip to support multiple stringing configurations by activating different segments.
Solution Approach 2:
The system transitions from a static, fixed stringing configuration to a dynamic, adjustable one. By offsetting the hole axes relative to grommet axes and enabling selective use of different grommet groups, the stringing pattern can be dynamically changed without altering the underlying racket structure or bore arrangement.
2Adaptability or versatility
If different grommet strips are used to achieve different stringing configurations, then stringing variability is enabled, but the device complexity and number of components increase
Solution Approach 1:
A single grommet strip is designed to perform multiple functions by supporting different stringing configurations. The same physical grommets can be arranged in different patterns (e.g., using different groups of grommets) to create various stringing patterns, eliminating the need for multiple dedicated grommet strips.
Solution Approach 2:
Multiple potential grommet configurations are merged into a single integrated grommet strip. Instead of having separate strips for different stringing patterns, all possible grommet positions and arrangements are combined in one strip, with selective activation of different grommet groups to achieve desired patterns.
3Adaptability or versatility
If the hole axes are offset with respect to grommet axes, then flexible stringing configurations are enabled, but the manufacturing precision requirements increase
Solution Approach 1:
The offset between hole axes and grommet axes is applied locally and selectively rather than uniformly across all grommets. Different groups of grommets have different offset patterns, allowing precise control over stringing configuration while managing manufacturing complexity through localized rather than global precision requirements.
Data Source
AI summary
The present invention relates to a grommet strip for a racket for ball games, wherein the grommet strip comprises a longitudinal direction and a plurality of grommets 1 comprising grommet through-holes 2, wherein each of the grommets 1 defines a grommet axis A and each of the grommet through-holes 2 defines a hole axis B, wherein the grommet axes A and the hole axes B extend substantially parallel to each other and wherein the hole axes B of some grommets are offset with respect to the grommet axes A thereof in the longitudinal direction of the grommet strip.