Title:
バドミントンラケット
Document Type and Number:
Japanese Patent JP7404920
Kind Code:
B2
Abstract:
A badminton racket 2 includes a shaft 4, a frame 6, a grip 8, and a string 10. A flexural rigidity value EI(2) of the shaft 4 at a second measurement point located at a distance of 95 mm from the grip 8 is smaller than a flexural rigidity value EI(1) of the shaft 4 at a first measurement point located at a distance of 35 mm from the grip 8. A flexural rigidity value EI(3) of the shaft 4 at a third measurement point located at a distance of 155 mm from the grip 8 is smaller than the flexural rigidity value EI(2).
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Inventors:
Wataru Kimitsuka
Application Number:
JP2020025154A
Publication Date:
December 26, 2023
Filing Date:
February 18, 2020
Export Citation:
Assignee:
Sumitomo Rubber Industries, Ltd.
International Classes:
A63B49/00
Domestic Patent References:
| JP2014045947A | ||||
| JP10179811A | ||||
| JP2000093559A | ||||
| JP11262545A |
Foreign References:
| CN208465113U | ||||
| CN108310736A |
Attorney, Agent or Firm:
Ariko Patent Office
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