Patent ID: 7201680

Claim:
A racket frame comprising a grip part, a shaft part, a throat part, and a head part formed with a fiber reinforced resin so as to be hollow and having a weight not less than 100 g nor more than 270 g, said racket frame being provided with a dynamic damper comprising a rod-shaped mass member and a viscoelastic member in the form of a sheet mounted on a part of a peripheral surface of said rod-shaped mass member; wherein said dynamic damper is mounted inside said grip part by fixing said viscoelastic member to a position of an inner wall of said grip part located within a range of 0.2 L from a free end of said grip part, supposing that a whole length of said racket frame is L in such a way that inside said grip part, at least one part of said mass member is shakable with respect to said inner wall of said grip part; and wherein both end portions of said rod-shaped mass member are shapable; said rod-shaped mass member having a length not less than 2 cm nor more than 5 cm and a weight not less than 2 g nor more than 10 g, and said viscoelastic member being wound around a small diameter portion formed at a central portion of said rod-shaped mass member in a longitudinal direction thereof.