Title:
RACKET
Document Type and Number:
Japanese Patent JP2014171526
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a tennis racket capable of enlarging the sweet spot of the racket without changing the shape of a frame.SOLUTION: A racket comprises; a grip; an annular frame 11 having a plurality of insertion holes formed for inserting a string thereinto; and a shaft 30 for connecting the grip and the frame 11 to each other. In the racket, the string going outside the frame 11 through the insertion holes, is turned back at a groove part 111 formed along the circumferential direction of the frame 11 on the outer circumferential surface of the frame 11, and when the longitudinal direction of the racket or the width direction orthogonal to the longitudinal direction on the hitting surface of the racket is made a first direction, the depth of the turning-back position of the string at a second position P3 on the outer side in the first direction than a first position P1 in the outer circumferential surface of the frame 11 is shallower than the depth of the turning-back position of the string at the first position P1 in the first direction in the outer circumferential surface of the frame 11.
Inventors:
OGAWA NAOTO
SAITO SHINJI
IWAZAWA TOMOYA
SAITO SHINJI
IWAZAWA TOMOYA
Application Number:
JP2013044426A
Publication Date:
September 22, 2014
Filing Date:
March 06, 2013
Export Citation:
Assignee:
YONEX CO LTD
International Classes:
A63B49/02; A63B51/06
Domestic Patent References:
| JPH0938241A | 1997-02-10 | |||
| JPS6346168U | 1988-03-29 | |||
| JPH1033722A | 1998-02-10 | |||
| JP2001170219A | 2001-06-26 | |||
| JPH1099472A | 1998-04-21 |
Foreign References:
| EP1060767A2 | 2000-12-20 |
Attorney, Agent or Firm:
All international patent business corporation
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