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Strengthened and vibration-damping shaft for sports equipment

a technology for sports equipment and shafts, applied in the direction of golf clubs, sport equipment, etc., can solve the problems of user's hands being injured, the user cannot precisely determine the destination, etc., and achieve the effect of improving the support efficiency

Inactive Publication Date: 2005-12-08
TSAI MEI LI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention provides a strengthening shaft with a central body inside to improve its supporting efficiency. Additionally, it has multiple holes in the central body to minimize vibration and provide a shock-reducing efficiency. These technical effects make the shaft more durable and reliable for use in various applications."

Problems solved by technology

The deformation of the shaft causes an inaccurate trajectory of the ball so that a user can not precisely determine the destination of the ball.
Additionally, vibration that occurs during impact of the ball and shaft causes injury to the user's hands.

Method used

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  • Strengthened and vibration-damping shaft for sports equipment
  • Strengthened and vibration-damping shaft for sports equipment
  • Strengthened and vibration-damping shaft for sports equipment

Examples

Experimental program
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Effect test

first embodiment

[0018] With further reference to FIGS. 3 and 4, arrangements of the damping holes (20) can be varied. In FIG. 3, the damping holes (20) are longitudinally defined in sides of the flat central body (15) at intervals along the entire length of the flat central body (15) to eliminate the vibration gradually. In FIG. 4, the damping holes (20) are selectively defined in partial sections at sides of the flat central body (15) at intervals but not over the entire length of the flat central body (15). With reference to FIG. 5, a second preferred embodiment of the strengthening and vibration-damping shaft has the same structure with the first embodiment except that the central body ( 16) is cruciform in cross section. The cruciform central body (16) correspondingly has four sides respectively connected to the inner periphery of the round tube (10). Multiple damping holes (20) are defined in each side of the cruciform central body (16).

third embodiment

[0019] With reference to FIG. 6, the strengthening and vibration-damping shaft for sports equipment has an oval cross-section tube (101).

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PUM

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Abstract

A strengthening and vibration-damping shaft for sports equipment has a tube, a central body accommodated inside the tube, and multiple damping holes defined in the central body partly or completely along the length of of the central body. The central body provides a supporting efficiency to the shaft to prevent the shaft curving or deforming when the shaft is being swung. The damping holes mitigate and decrease vibration transmission to eliminate most vibrating energy. Therefore, the shaft has less vibration to keep the shaft steady for accurate hitting without deformation.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a shaft for sports equipment, and more particularly to a shaft that has strengthening and vibration-damping efficiency. [0003] 2. Description of Related Art [0004] Many items of sports equipment have a shaft, especially badminton rackets and golf clubs, wherein the shaft is long and thin. Conventional II shafts in such equipment have a simple tubular structure without any strengthening element. Therefore, the shaft is easily deformed and curved by a reacting force when being violently swung to hit a ball. The deformation of the shaft causes an inaccurate trajectory of the ball so that a user can not precisely determine the destination of the ball. Additionally, vibration that occurs during impact of the ball and shaft causes injury to the user's hands. [0005] The present invention has arisen to mitigate or obviate the disadvantages of the conventional shaft for sports equipment. SUMM...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A63B53/12A63B53/10A63B59/00
CPCA63B53/10A63B53/12A63B60/10A63B60/00A63B60/54A63B60/08A63B60/50A63B60/06
Inventor TSAI, MEI-LI
Owner TSAI MEI LI