Title:
METHOD FOR DETERMINING BENDING POINT OF GOLF CLUB, GOLF CLUB SHAFT WITH FEATURES EXPRESSED BY THE METHOD, AND GOLF CLUB EQUIPPED WITH THE GOLF CLUB SHAFT
Document Type and Number:
Japanese Patent JP3243209
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To match measured characteristics of a golf club with a feeling in a swing by judging characteristics including bending point of the shaft by curvature distribution calculated from data of measurement of the distribution of bending moment loaded on a shaft in a swing and bending rigidity distribution.
SOLUTION: The grip side of a shaft 2 is fixed by a fixing part 11. Bending moment is applied loaded on the tip end part of the shaft 2 by a torque sensor 12. A laser sizer 13 is moved from a measuring part 11 side to the tip end side. A flexure curve and an outer shape Dere measured and inputted into CPU. A load is inputted from the torque sensor 12. Then the flexure curve of the shaft center axis is calculated. CPU circular-approximates by the least square method to calcualte the curvature radius on which binding moment acts and the center to calculate the curvature distribution. CPU also calculates the bending moment from the load and the distance from the load to complete. The CPU calculates the bending rigidity distribution of the shaft 2.
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Inventors:
Hiroki Ashida
Application Number:
JP35107097A
Publication Date:
January 07, 2002
Filing Date:
December 19, 1997
Export Citation:
Assignee:
Mitsuno Co., Ltd.
International Classes:
A63B53/00; A63B53/10; A63B53/12; A63B102/32; (IPC1-7): A63B53/00; A63B53/10; A63B53/12
Attorney, Agent or Firm:
Fukami Hisaro (2 outside)
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