| 摘要 |
<p>A game racket frame of fiber reinforced plastic consists of a head formed of an oval main body which is composed of a first inner tube, a second inner tube, and an outer tube. The inner tubes are arranged side by side in the direction toward the head face of the game racket such that the adjoining walls of the inner tubes are attached for forming cross ribs in the main body, and that the outer walls of the inner tubes are intimately attached to the inner wall of the outer tube. The interior of the main body is provided with the cavities of the inner tubes. The main body is further provided with a plurality of string holes extending through the main body in the direction toward the head face of the game racket. The sideway structural strength of the main body is thus reinforced by the cross ribs formed at the junctions of the laminated inner tubes. The intimate association of the laminated outer tube with the walls of the laminated inner tubes eliminates the stress concentration that tends to take place at the junctions of the laminated inner tubes.</p> |
