Title:
BADMINTON RACKET
Document Type and Number:
WIPO Patent Application WO/2021/059802
Kind Code:
A1
Abstract:
Provided is a badminton racket wherein, when a shaft thereof breaks, separation at the position of the break can be avoided. A racket (10) according to the present invention comprises: a frame (13) that extends in a ring shape; a grip (11); and a shaft (12) that links the frame and the grip. The shaft comprises an innermost layer (21) and a shaft-forming layer (22) stacked to the outside of the innermost layer. The shaft is formed by overlapping and wrapping a plurality of sheets (S) of fibrous reinforcing material impregnated with resin. The plurality of sheets comprises an innermost layer sheet (S01) that forms the innermost layer, and shaft-forming sheets (S11–S13) which form the shaft-forming layer and in which the reinforcing material is carbon fibers. The reinforcing material in the innermost layer sheet is ultra-high-density polymer fibers.
Inventors:
MASAKI TAKESHI (JP)
OTANI KAZUYA (JP)
OTANI KAZUYA (JP)
Application Number:
PCT/JP2020/031193
Publication Date:
April 01, 2021
Filing Date:
August 19, 2020
Export Citation:
Assignee:
YONEX CO LTD (JP)
International Classes:
A63B49/00; A63B102/04
Foreign References:
| JP2018130524A | 2018-08-23 | |||
| JP2012523334A | 2012-10-04 | |||
| JP2015061923A | 2015-04-02 | |||
| JPH04357010A | 1992-12-10 | |||
| US20120190473A1 | 2012-07-26 |
Attorney, Agent or Firm:
AOKI, Hiroyoshi et al. (JP)
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