Frame made of resin impregnated with fibers for sports racquet has metallic fibers lying parallel to each other and orientated in direction of stress

摘要

The racquet (1) has a fame of square or rectangular tubular section, forming an oval shape to hold the strings under tension. There are frame members (3,4) connected to the handle (5). The frame is made of plastics resin, with metal fibers running longitudinally in a surface layer (2) and circumferentially in an interior layer.