CN219355220U - Tennis ball - Google Patents

Abstract

The utility model discloses a tennis ball, which comprises a ball body, wherein the ball body is of a solid structure without bubbles inside, the outer diameter of the ball body is 63-64 mm, the rebound coefficient of the ball body is 0.61-0.72, the ball body is made of rubber, and the Shore hardness of the ball body is 42-48 HA. The ball ensures that the ball can rebound to the height of 1.11-1.31 m after freely falling to the ground at the height of 1.82m, the ball is made of rubber, the rubber is cured completely, the ball is of a solid structure without bubbles inside, a stable rebound coefficient is maintained, the bouncing path is stable, the ball achieves the effect of moderate softness, the ball is not too painful when hit on the body of a player, the ball is limited in compression deformation after being impacted, the ball cannot penetrate in the gap of a eye shield, the eyes or the head of the player are prevented from being directly damaged, the safety of the player can be effectively ensured, and the popularization of the sports is facilitated.

Description

Tennis ball

Technical Field

The utility model relates to sports articles, in particular to a stick tennis ball.

Background

The tennis ball, also called net baseball or lacrosse, is an ancient sport, which uses the net bag at the top end of the club to control the movement of the ball body, and uses the lever principle to transfer the ball body in the net bag in a throwing way and shoot the ball for scoring, so as to determine the number of the final scores of the ball body to play the game. Meanwhile, the ball game is called as one of the fastest ball games in the world, is a team sport project integrating the characteristics of football, basketball and puck, and can be quickly attacked and attended by players in the field, so that the attack and defense conversion speed is high, and the body is vigorous.

However, because the ball speed of the stick tennis is high, the ball body of the stick tennis is hard, the ball is very painful to hit on the body of a player, safety accidents are easy to cause, and the popularization of the sport is not facilitated; some ball bodies of the stick tennis balls are softer, are seriously deformed by compression after impact, are easy to penetrate through gaps of eye shields worn by players, directly damage eyes or heads of the players, and are dangerous. In addition, many uneven bubbles are easily generated in the ball body to influence the rebound coefficient, and the rebound is eccentric and the rebound path is abnormal.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the stick tennis ball capable of guaranteeing the safety of players.

According to the embodiment of the utility model, the tennis ball comprises a ball body, wherein the ball body is of a solid structure without bubbles inside, the outer diameter of the ball body is 63-64 mm, the rebound coefficient of the ball body is 0.61-0.72, the ball body is made of rubber, and the Shore hardness of the ball body is 42-48 HA.

Has at least the following beneficial effects: the ball body of the stick tennis ball has the outer diameter of 63-64 mm and the rebound coefficient of 0.61-0.72, ensures that the ball body can rebound to the height of 1.11-1.31 m after freely falling to the ground at the height of 1.82m, is made of rubber, is completely cured, ensures that the ball body is of a solid structure without bubbles inside, maintains stable rebound coefficient, and has stable rebound path, the Shore hardness of the ball body is 42-48 HA, the moderate effect of softness is achieved, the ball is not too painful when hit on the body of a player, the ball body is limited in compression deformation after being impacted, the ball body cannot penetrate in a gap of a eye shield, the eyes or the head of the player is prevented from being directly damaged, the safety of the player can be effectively ensured, and the popularization of the sports is facilitated.

According to some embodiments of the utility model, the surface of the sphere is provided with a plurality of swirl grooves in an inward concave manner, and the swirl grooves are symmetrically distributed on the surface of the sphere at the spherical center point of the sphere.

According to some embodiments of the utility model, the recess depth of the swirl groove is 0.2-0.6 mm.

According to some embodiments of the utility model, the cross section of the swirl groove is regular polygon.

According to some embodiments of the utility model, a cross section of one part of the swirl grooves is regular hexagon, and a cross section of the other part of the swirl grooves is regular pentagon.

According to some embodiments of the utility model, more swirl slots are present with a regular hexagonal cross section than are present with a regular pentagonal cross section.

According to some embodiments of the utility model, the surface of the sphere is convexly provided with a convex rib between any two adjacent swirl grooves, and each convex rib extends to two ends until the convex rib intersects with the adjacent convex rib.

According to some embodiments of the utility model, any two intersecting ribs intersect a third rib at the same time at the intersection.

According to some embodiments of the utility model, the height of the protruding edge protruding from the surface of the sphere is 0.15-0.5 mm.

According to some embodiments of the utility model, the ball and the rib are integrally formed.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The utility model is further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic view of a part of an embodiment of the present utility model;

FIG. 2 is a schematic diagram of another part of the embodiment of the present utility model;

fig. 3 is a partial enlarged view at a in fig. 2.

Reference numerals: sphere 1, swirl groove 2, bead 3, intersection 4.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as inner, outer, bottom, center, radial, etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and to simplify the description, rather than to indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model.

In the description of the present utility model, the description of the first and second is only for the purpose of distinguishing technical features, and should not be construed as indicating or implying relative importance or implying the number of technical features indicated or the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

Referring to fig. 1 to 3, the utility model discloses a tennis ball, which comprises a ball 1, wherein the ball 1 is of a solid structure without bubbles inside, the outer diameter of the ball 1 is 63-64 mm, and the rebound coefficient of the ball 1 is 0.61-0.72.

The ball 1 is ensured to rebound to the height of 1.11-1.31 m after freely falling at the height of 1.82m from the ground.

The ball 1 is made of rubber, the rubber is cured completely, the ball 1 is guaranteed to be of a solid structure without bubbles inside, a stable rebound coefficient is maintained, a bouncing path is stable, the Shore hardness of the ball 1 is 42-48 HA, the effect of moderate softness is achieved, the ball is not too painful when hit on the body of a player, the ball 1 is limited in compression deformation after being hit, penetration in a gap of a eye shield is avoided, eyes or heads of the player are prevented from being damaged directly, safety of the player can be effectively guaranteed, and popularization of the sports is facilitated.

Referring to fig. 1, in some embodiments, the sphere 1 may be specifically a solid sphere with a smooth surface.

Referring to fig. 2 and 3, in other embodiments, the surface of the sphere 1 is concavely provided with a plurality of swirl grooves 2, and when the sphere 1 moves at a high speed, each swirl groove 2 can generate air swirl nearby, and the air swirl can interfere with the air flow around the sphere 1 when moving at a high speed, so that the resistance is reduced and the flight distance is prolonged.

The vortex grooves 2 are symmetrically distributed on the surface of the ball 1 at the spherical center of the ball 1, so that each vortex groove 2 is provided with another vortex groove 2 which is in point symmetry with the other vortex groove, opposite air vortices can be generated by the vortex grooves, two air vortices are approximately counteracted, the influence of the air vortices on the movement direction of the ball 1 is reduced, the movement path of the ball is stable when a ball player receives a pass, uncontrollable factors of a game are reduced, and the quality of the ball player receiving the pass is improved.

In some embodiments, the recess depth of the vortex groove 2 is 0.2-0.6 mm, and on the premise of ensuring that air vortex can be generated nearby, compared with the outer diameter of the sphere 1, the recess depth of the vortex groove 2 is negligible, and the overall size of the sphere 1 is not affected.

Referring to fig. 2, the cross section of the swirl groove 2 is a regular polygon, wherein the cross section of one part of the swirl groove 2 is a regular hexagon, the cross section of the other part of the swirl groove 2 is a regular pentagon, the cross section of the swirl groove 2 with a regular hexagon is more than the cross section of the swirl groove 2 with a regular pentagon, and a small part of the swirl groove adopts a regular pentagon design because two regular hexagon inner angles and one regular pentagon inner angle are close to one circumference angle and less than one circumference angle, so that the whole sphere 1 can be made to be in a spherical shape by the design.

Referring to fig. 2 and 3, in some embodiments of the present utility model, the surface of the sphere 1 is convexly provided with one rib 3 between any adjacent two of the swirl grooves 2, and each rib 3 extends toward both ends until intersecting with the adjacent rib 3.

Specifically, referring to fig. 3, any two intersecting ribs 3 intersect with the third rib 3 at the intersection point 4 at the same time, so that the periphery of any one of the swirl grooves 2 is surrounded by a plurality of ribs 3, and the plurality of ribs 3 can form additional air swirls near the swirl groove 2, and the air swirls formed by the swirl groove 2 are different in size, but can affect each other, so that air turbulence determined by acting force is difficult to form behind the sphere 1, and uncontrollable factors of the competition are further reduced.

In some embodiments, the height of the protruding edge 3 protruding from the surface of the sphere 1 is 0.15-0.5 mm, and on the premise of ensuring that air vortex can be generated nearby, compared with the outer diameter of the sphere 1, the protruding height of the protruding edge 3 is negligible, and the overall size of the sphere 1 is not affected.

In some embodiments, the sphere 1 and the convex rib 3 are in an integrated structure, and the manufacturing is simple, convenient and quick.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

Of course, the present utility model is not limited to the above-described embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present utility model, and these equivalent modifications or substitutions are included in the scope of the present utility model as defined in the claims.

Claims (10)

1. The tennis ball is characterized by comprising a ball body, wherein the ball body is of a solid structure without bubbles inside, the outer diameter of the ball body is 63-64 mm, the rebound coefficient of the ball body is 0.61-0.72, the ball body is made of rubber, and the Shore hardness of the ball body is 42-48 HA.

2. The tennis ball according to claim 1, wherein said ball surface is inwardly recessed with a plurality of swirl grooves, said swirl grooves being symmetrically distributed on said ball surface at the center of said ball.

3. The roll ball of claim 2, wherein the swirl groove has a depression depth of 0.2 to 0.6mm.

4. The roll ball of claim 2, wherein the swirl groove is regular polygonal in cross section.

5. The roll ball of claim 4, wherein a portion of said swirl grooves are regular hexagons in cross-section and another portion of said swirl grooves are regular pentagons in cross-section.

6. The roll ball of claim 5, wherein more of said swirl slots are regular hexagons in cross section than regular pentagons in cross section.

7. The ball of any one of claims 2 to 6, wherein the surface of the ball is convexly provided with a rib between any adjacent two of the swirl grooves, each rib extending toward both ends until intersecting the adjacent rib.

8. The roll ball of claim 7, wherein any two intersecting ribs intersect a third rib at the same time at the intersection point.

9. The roll ball of claim 7, wherein the height of the protrusions protruding from the surface of the ball is 0.15-0.5 mm.

10. The ball of claim 7, wherein the ball and the rib are of unitary construction.