Sports racket with two rows of holes for strings - has holes in two edges jutting out inside frame and strings form two distinct hitting surfaces

摘要

The racket frame (11) has 2 rows of holes (17, 18) round its circumference to accommodate the strings (19, 20). The frame has 2 edges (15, 16) that jut out axially along its interior circumference. The holes are in these edges and their axes are perpendicular to the hitting surface. - The strings are in 2 layers which give 2 distinct hitting surfaces which can be at different tensions and can be differently strung. The frame can have 2 grooves along its external circumference with the holes in these grooves, parallel to the hitting surface.