Title:
GROMMETS AND RACKET
Document Type and Number:
WIPO Patent Application WO/2020/184453
Kind Code:
A1
Abstract:
The present invention improves ball flight performance when a ball is hit by a racket and attains a preferable ball-hitting feel. Grommets (25-28) are configured to be provided with cylindrical parts (32) which are fitted in and pass through through-holes (23) formed in the frame (20) of a racket (10) and through which a string (21) passes. When being tensioned on the frame, the string is folded back at a fold-back position (F) located at a one-end-side of each of the cylindrical parts. The cylindrical parts are each provided with: a first forming portion (35) that is positioned on the fold-back position side with respect to the central axis position (Cb) of the outer circumferential surface of the cylindrical part; and a second forming portion (36) that is positioned on the side opposite to the first forming portion across the central axis position. The first forming portion is formed to have a greater thickness in the radial direction of the cylindrical part than the second forming portion.
Inventors:
OGAWA NAOTO (JP)
Application Number:
PCT/JP2020/009757
Publication Date:
September 17, 2020
Filing Date:
March 06, 2020
Export Citation:
Assignee:
YONEX CO LTD (JP)
International Classes:
A63B49/022; A63B60/54; A63B102/02
Foreign References:
| US20150157902A1 | 2015-06-11 | |||
| JP2018089153A | 2018-06-14 | |||
| JP2014171524A | 2014-09-22 | |||
| JP2002537004A | 2002-11-05 | |||
| JP2019042725A | 2019-03-22 |
Other References:
See also references of EP 3936198A4
Attorney, Agent or Firm:
AOKI, Hiroyoshi et al. (JP)
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