The present invention relates to a grommet strip for a racket for ball games, wherein the grommet strip comprises a longitudinal direction and a plurality of grommets 1 comprising grommet through-holes 2, wherein each of the grommets 1 defines a grommet axis A and each of the grommet through-holes 2 defines a hole axis B, wherein the grommet axes A and the hole axes B extend substantially parallel to each other and wherein the hole axes B of some grommets are offset with respect to the grommet axes A thereof in the longitudinal direction of the grommet strip.

A racket including: a grip; an annular frame provided with a plurality of through holes extending through from an inner peripheral face to an outer peripheral face; a shaft connecting the grip and the frame; and a grommet to be attached to the outer peripheral face of the frame, the grommet including: a plurality of tube sections to be inserted into each of the plurality of through holes provided to the frame; and a base section that connects the plurality of tube sections to one another, the tube sections each including a communicating hole that communicates a base section side opening on the base section side with a tip end side opening on the side to be inserted through the through hole, the tip end side openings of at least some number of the tube sections, of the plurality of tube sections through which a string to be strung in a direction along a longitudinal direction of the racket is inserted, being wider than the base section side openings in a direction in which the plurality of tube sections is arranged.

A racket including: a grip; an annular frame provided with a plurality of through holes extending through from an inner peripheral face to an outer peripheral face; a shaft connecting the grip and the frame; and a grommet to be attached to the outer peripheral face of the frame, the grommet including: a plurality of tube sections to be inserted into each of the plurality of through holes provided to the frame; and a base section that connects the plurality of tube sections to one another, the tube sections each including a communicating hole that communicates a base section side opening on the base section side with a tip end side opening on the side to be inserted through the through hole, the tip end side openings of at least some number of the tube sections, of the plurality of tube sections through which a string to be strung in a direction along a longitudinal direction of the racket is inserted, being wider than the base section side openings in a direction in which the plurality of tube sections is arranged.

A grommet (20) includes a tubular portion (21). The tubular portion extends along a first direction (DR1), and has a tip end (21a) and a base end (21b) located opposite to the tip end in the first direction. The tubular portion is provided with a through hole (21c) extending in the first direction and opening at the tip end and the base end of the tubular portion. When the tubular portion is viewed from the tip end along the first direction, a first opening edge (21d) has a first portion (21da), the first opening edge being an opening edge of the through hole at the tip end of the tubular portion. The first portion has a first end and a second end, the first end being an intersection point of a first line (L1) and the first opening edge, the first line passing through a center (C) of the through hole and along a second direction (DR2) orthogonal to the first direction, the second end being an intersection point of a second line (L2) and the first opening edge, the second line passing through the center of the through hole and along a third direction (DR3) orthogonal to the first direction and the second direction.

A grommet (20) includes a tubular portion (21). The tubular portion extends along a first direction (DR1), and has a tip end (21a) and a base end (21b) located opposite to the tip end in the first direction. The tubular portion is provided with a through hole (21c) extending in the first direction and opening at the tip end and the base end of the tubular portion. When the tubular portion is viewed from the tip end along the first direction, a first opening edge (21d) has a first portion (21da), the first opening edge being an opening edge of the through hole at the tip end of the tubular portion. The first portion has a first end and a second end, the first end being an intersection point of a first line (L1) and the first opening edge, the first line passing through a center (C) of the through hole and along a second direction (DR2) orthogonal to the first direction, the second end being an intersection point of a second line (L2) and the first opening edge, the second line passing through the center of the through hole and along a third direction (DR3) orthogonal to the first direction and the second direction.

The present invention relates to a ball-striking device (1), in particular a tennis, squash, or badminton racket, having a head frame (2), which comprises a striking surface, is of a hollow design, and is produced from plastic, in particular from a fiber-reinforced plastic, and a shaft formed thereon with grip, wherein the striking surface (12) is defined by at least one string (8), which is tensioned in a crisscross manner and which forms string portions fastened substantially in parallel to one another on the head frame, wherein the anchoring of the string portions on the head frame (2) is performed via retainers (20) which are fastened on the inner side of the head frame so that they each extend substantially perpendicularly in relation to the striking surface, whereby the ends (10) of the string portions clamped in the retainers (20) can be laterally deflected upon impact of a ball. With the goal of specifying such a ball-striking device and a method for the production thereof, in which the anchoring of the string portions on the head frame is performed via retainers which may be arranged precisely and easily in the head frame and are also suitable for a mass production method, it is provided that the retainers (20) are open toward one of the two sides of the striking surface (12) and/or are freely accessible from one of the two sides of the striking surface (12) for clamping the string which defines the striking surface.

The present invention relates to a ball-striking device (1), in particular a tennis, squash, or badminton racket, having a head frame (2), which comprises a striking surface, is of a hollow design, and is produced from plastic, in particular from a fiber-reinforced plastic, and a shaft formed thereon with grip, wherein the striking surface (12) is defined by at least one string (8), which is tensioned in a crisscross manner and which forms string portions fastened substantially in parallel to one another on the head frame, wherein the anchoring of the string portions on the head frame (2) is performed via retainers (20) which are fastened on the inner side of the head frame so that they each extend substantially perpendicularly in relation to the striking surface, whereby the ends (10) of the string portions clamped in the retainers (20) can be laterally deflected upon impact of a ball. With the goal of specifying such a ball-striking device and a method for the production thereof, in which the anchoring of the string portions on the head frame is performed via retainers which may be arranged precisely and easily in the head frame and are also suitable for a mass production method, it is provided that the retainers (20) are open toward one of the two sides of the striking surface (12) and/or are freely accessible from one of the two sides of the striking surface (12) for clamping the string which defines the striking surface.

A racket including: a grip; an annular frame provided with a plurality of through holes extending through from an inner peripheral face to an outer peripheral face; a shaft connecting the grip and the frame; and a grommet to be attached to the outer peripheral face of the frame, the grommet including: a plurality of tube sections to be inserted into each of the plurality of through holes provided to the frame; and a base section that connects the plurality of tube sections to one another, the tube sections each including a communicating hole that communicates a base section side opening on the base section side with a tip end side opening on the side to be inserted through the through hole, the tip end side openings of at least some number of the tube sections, of the plurality of tube sections through which a string to be strung in a direction along a longitudinal direction of the racket is inserted, being wider than the base section side openings in a direction in which the plurality of tube sections is arranged.

A racket including: a grip; an annular frame provided with a plurality of through holes extending through from an inner peripheral face to an outer peripheral face; a shaft connecting the grip and the frame; and a grommet to be attached to the outer peripheral face of the frame, the grommet including: a plurality of tube sections to be inserted into each of the plurality of through holes provided to the frame; and a base section that connects the plurality of tube sections to one another, the tube sections each including a communicating hole that communicates a base section side opening on the base section side with a tip end side opening on the side to be inserted through the through hole, the tip end side openings of at least some number of the tube sections, of the plurality of tube sections through which a string to be strung in a direction along a longitudinal direction of the racket is inserted, being wider than the base section side openings in a direction in which the plurality of tube sections is arranged.

Performance of a racket can be adjusted. A racket includes a grip, an annular frame that is provided with a plurality of through holes that penetrate from an inner circumferential face to an outer circumferential face, and a shaft that connects the grip and the frame in a shaft axis direction, the frame having a rear end side attachment part, on the outer circumferential face of the frame and on a side closer to the shaft in the shaft axis direction, where there is mounted a rear end side attachment to which a string tensely provided to the frame is routed, and the rear end side attachment being made of a material different from the frame.