CN219848057U - Racquet with multi-layer core material - Google Patents

Abstract

The utility model discloses a board net racket with a plurality of layers of core materials, which comprises a ball striking part and a holding part, wherein the ball striking part comprises a racket frame, a first surface layer, a second surface layer and an inner layer structure, the racket frame is provided with an inner wall and a containing space formed by surrounding the inner wall, the inner layer structure is arranged in the containing space and comprises an upper core material, a lower core material and at least one middle layer core material, the first surface layer and the second surface layer are respectively paved on the top surface of the upper core material and the bottom surface of the lower core material and are connected with the racket frame, and the rigidity of the upper core material is higher than that of the lower core material. Through the structural design of the board net racket, the front racket surface and the back racket surface of the board net racket have different rigidities.

Description

Racquet with multi-layer core material

Technical Field

The utility model relates to a tennis racket, in particular to a tennis racket with a multi-layer core material, wherein the front and back racket surfaces have different rigidities.

Background

Tennis bat (tennis) is a sport that is batted with a racket and resembles tennis, and is played singly or in both directions, and has a smaller activity and a smaller quantity of motion than tennis, and is therefore suitable for people of all ages, and has been popular and popular in recent years.

The core material in the traditional slate racket is uniform and is made of the core material of a single material, so that the rigidity of the front racket surface and the back racket surface of the traditional slate racket are the same, and therefore under the same swing force and swing angle, the force of the ball which is struck by the front racket surface and the back racket surface is the same, the playing method of players is limited during competition, and the precision and the chroma of competition are reduced.

Disclosure of Invention

One of the objects of the present utility model is to provide a new structural design for a racquet with a front face that is different from the back face in terms of stiffness.

The utility model provides a slate racket with a multi-layer core material, which comprises a hitting part and a holding part connected with the hitting part, wherein the hitting part comprises a racket frame, a first surface layer, a second surface layer and an inner layer structure. The racket frame is provided with an inner wall and a containing space formed by surrounding the inner wall, the inner layer structure is arranged in the containing space and comprises an upper core material, a lower core material and at least one middle core material which are overlapped between the upper core material and the lower core material, the first surface layer is paved on the top surface of the upper core material and connected with the upper edge of the racket frame, the second surface layer is paved on the bottom surface of the lower core material and connected with the lower edge of the racket frame, and the rigidity of the upper core material is greater than that of the lower core material. Through the structural design of the board net racket, the force of the ball struck by the front racket surface (for example, the surface corresponding to the upper core material) and the back racket surface (for example, the surface corresponding to the lower core material) is different, so that a player can strongly strike back the ball with the front racket surface or can control the ball and hang the ball with the back racket surface, and the player can play more games during competition, thereby being beneficial to increasing the precision and the chroma during competition.

In one aspect, the upper core material may be made of a different material than the lower core material, with the different materials providing the upper core material with different stiffness than the lower core material.

In another aspect, the upper core material may be made of the same material as the lower core material, but the upper core material and the lower core material are both of a foamed layer structure, and the upper core material and the lower core material are both made of the same material by foaming, and the porosity of the upper core material is smaller than that of the lower core material, so that the rigidity of the upper core material and the lower core material can be effectively controlled through different porosities.

In another aspect, the number of layers of the intermediate layer core may be one, and the intermediate layer core may be a honeycomb board.

In another aspect, the overall density of the upper core material is greater than the overall density of the lower core material.

In another aspect, other structural designs may be employed for the inner layer structure. Specifically, the upper core material may be a honeycomb board and the honeycomb board of the upper core material has a plurality of upper hexagonal units, and the lower core material may be a honeycomb board and the honeycomb board of the lower core material has a plurality of lower hexagonal units. The upper core material is made of the same material as the lower core material, and the size of each upper hexagonal unit is smaller than that of each lower hexagonal unit. The rigidity of the upper core material and the lower core material can be effectively controlled by the sizes of the different hexagonal units.

In another aspect, the upper core material may be a honeycomb board and the honeycomb board of the upper core material has a plurality of upper hexagonal units, the lower core material may be a honeycomb board and the honeycomb board of the lower core material has a plurality of lower hexagonal units, the size of each upper hexagonal unit is equal to the size of each lower hexagonal unit, but the upper core material and the lower core material are made of different materials. The upper core material and the lower core material can still have different rigidities by simply using different materials.

In another aspect, the middle layer core is bonded between the upper layer core and the lower layer core.

In another aspect, the ball striking portion has a thickness of between 22 millimeters and 38 millimeters, thereby conforming to the specifications of a racquet.

Drawings

The detailed construction and features of the tennis racquet described in connection with the following examples will be described in the following examples, however, it should be understood that the following examples and the accompanying drawings are only illustrative and should not be construed to limit the scope of the present utility model, in which:

FIG. 1 is a perspective view of a racquet of a first embodiment;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a partial perspective cross-sectional view of FIG. 1;

FIG. 4 is a cross-sectional view of FIG. 2 taken along line 4-4;

FIG. 5 is a cross-sectional view of a tennis racket of a second embodiment;

FIG. 6 is a partial perspective sectional view of a racquet of a third embodiment; and

fig. 7 is a partial perspective sectional view of a racquet of a fourth embodiment.

Reference numerals:

1, 1';

10, a batting part;

11, top surface;

12, bottom surface;

13, racket frame;

131, inner wall;

14, a first surface layer;

15, an inner layer structure;

151, upper core material;

152 an intermediate layer core material;

153, lower core material;

16 a second skin layer;

17, a through hole;

20, a holding part;

21, a handle belt;

UT, upper hexagonal unit;

UB: lower hexagonal cell.

Detailed Description

The present utility model will be further described in detail below with reference to specific embodiments and with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present utility model more apparent.

It should be noted that the technical features provided by the present utility model are not limited to the specific structures, uses and applications described in the embodiments. The terms used in the description are all exemplary descriptive terms, as understood by those of ordinary skill in the art, and directional terms, such as "front," "upper," "lower," "rear," "left," "right," "top," "bottom," "inner," and "outer," as used in this description are merely exemplary descriptive terms with reference to a normal use orientation and are not intended to limit the scope of the claims.

For the purpose of illustrating the technical features of the present utility model in detail, the following four embodiments are provided, and the following description is made with reference to the accompanying drawings, in which:

as shown in fig. 1 to 4, the first embodiment provides a racket 1, which includes a hitting portion 10 and a holding portion 20 connected to the hitting portion 10, wherein the hitting portion 10 is a portion of the racket 1 for hitting a ball, and the hitting portion 10 has a top surface 11 and a bottom surface 12 based on the drawing of fig. 3, and the top surface 11 and the bottom surface 12 can be respectively used as a front racket surface and a back racket surface, and of course, in some cases, it is also possible to use the top surface 11 of the hitting portion 10 as a back racket surface and the bottom surface 12 of the hitting portion 10 as a front racket surface, so the present embodiment is not limited. Typically, the thickness of the ball striking portion 10 (i.e., the distance between the top surface 11 and the bottom surface 12) is between 22 and 38 millimeters (mm) to meet the specifications of a racquet. The striking portion 10 structurally comprises a frame 13, a first cover 14, an inner structure 15, and a second cover 16. The racket frame 13 is formed by softening a carbon fiber composite material (carbon fiber reinforced composite material) after being heated under pressure, and then curing by a bridging reaction. The inside of the racket frame 13 is hollow in this embodiment, the racket frame 13 has an inner wall 131, and the inner wall 131 surrounds a diamond-shaped accommodating space. The inner layer structure 15 is disposed in the accommodating space. The first surface layer 14 and the second surface layer 16 are used for directly contacting with the ball, the first surface layer 14 and the second surface layer 16 are also made of carbon fiber reinforced composite materials, after the first surface layer 14 and the second surface layer 16 are solidified and formed, the first surface layer 14 is integrally connected with the upper edge of the racket frame 13, and the second surface layer 16 is integrally connected with the lower edge of the racket frame 13.

The inner layer structure 15 is disposed between the first surface layer 14 and the second surface layer 16, the inner layer structure 15 includes an upper core 151, a lower core 153, and an intermediate core 152 stacked between the upper core 151 and the lower core 153, the upper core 151 is used for bearing the impact of a front racket, and the first surface layer 14 is laid on the top surface of the upper core 151. The upper core 151 is a foaming layer structure, which is made of EVA (Ethylene/Vinyl Acetate copolymer) material with Shore A10-25 degrees, and the upper core 151 has lower porosity and higher overall density, so that the upper core 151 has higher rigidity, higher deformation resistance and influence on the beating feeling. The interlayer core 152 is used to provide a supporting effect, and in this embodiment, the number of layers of the interlayer core 152 is only one, and the number of layers of the interlayer core 152 can be adjusted according to practical needs. The middle layer core 152 is a honeycomb board in this embodiment, which may be made of aluminum sheet, cardboard, or PP (polypropylene) sheet. The top and bottom surfaces of the middle core 152 are bonded between the upper core 151 and the lower core 153 by an adhesive. The lower core 153 is used to bear the impact of the reverse racket, and the second surface layer 16 is laid on the bottom surface of the lower core 153. The lower core 153 is also a foamed layer structure, and is foamed from a PU (Polyurethane) material, and the lower core 153 has a high porosity (high foaming ratio) and a low overall density, so that the upper core 151 has a low rigidity as a whole. In addition, as shown in fig. 1 and 4, the striking part 10 is further provided with a plurality of through holes 17, and each through hole 17 penetrates through the first surface layer 14, the inner layer structure 15 and the second surface layer 16, so that air flow can smoothly pass through the striking part 10, thereby reducing wind resistance.

The holding part 20 is used for holding by a user, and the holding part 20 is integrally connected with the racket frame 13. In addition, the grip portion 20 is further covered with a grip belt 21, so that slip resistance and vibration resistance are achieved.

Because the upper core 151 and the lower core 153 are made of different foaming materials, and the porosity and the overall density of the upper core 151 and the lower core 153 are adjusted, the porosity of the upper core 151 is smaller than that of the lower core 153 (the foaming rate is lower), the overall density of the upper core 151 is greater than that of the lower core 153, and the rigidity of the upper core 151 is greater than that of the lower core 153. Through the structural design, the force of the ball struck by the player on the front racket surface with higher rigidity can be higher, so that the player can strongly strike back on the front racket surface. On the other hand, the force of the ball struck by the player by using the opposite-beating surface with lower rigidity is lower, so that the player can control the ball and hang the ball by using the opposite-beating surface, and therefore, the player can play more rules during competition, and the precision during competition is increased.

The present utility model further provides a second embodiment, please refer to fig. 5. The board tennis racket 1' of the second embodiment has a structure substantially the same as that of the board tennis racket 1 of the first embodiment, wherein one difference is that the upper core 151 and the lower core 153 of the second embodiment are both formed by foaming EVA materials, but the porosity of the upper core 151 is smaller than that of the lower core 153, and the rigidity of the upper core 151 can be still made larger than that of the lower core 153 by adjusting different porosities.

The present utility model further provides a third embodiment, please refer to fig. 6. The structure of the racquet 1″ of the third embodiment is substantially the same as that of the racquet 1 of the first embodiment, except that the upper core 151 of the third embodiment is a honeycomb plate and the honeycomb plate of the upper core 151 has a plurality of upper hexagonal cells UT, each of which has a regular hexagon in cross section, and the upper hexagonal cells UT are connected to each other. The upper core 151 is made of an aluminum plate. The number of layers of the intermediate layer core 152 is one, and the intermediate layer core 152 is foamed from an EVA material. The lower core 153 is also made of an aluminum plate. The lower core 153 is also a honeycomb board and the honeycomb board of the lower core 153 has a plurality of lower hexagonal units UB each having a regular hexagon in cross section, and the lower hexagonal units UB are connected to each other, and the size of each upper hexagonal unit UT is smaller than the size of each lower hexagonal unit UB. Although the material of the upper core 151 is the same as that of the lower core 153, the rigidity of the upper core 151 can be made greater than that of the lower core 153 by adjusting the sizes of the upper hexagonal cells UT and the lower hexagonal cells UB of the honeycomb panel.

The present utility model further provides a fourth embodiment, please refer to fig. 7. The structure of the racquet 1' "of the fourth embodiment is substantially the same as that of the racquet 1" of the third embodiment except that the upper core 151 is a honeycomb panel made of an aluminum plate, the lower core 153 is a honeycomb panel made of a PP plate, and the size of each upper hexagonal cell UT of the honeycomb panel of the upper core 151 is equal to the size of each lower hexagonal cell UB of the honeycomb panel of the lower core 153. By the difference in material, the rigidity of the upper core 151 can be made larger than that of the lower core 153.

Finally, it should be understood that the above-described embodiments of the present utility model are merely illustrative, and are not intended to limit the scope of the utility model, as modifications or variations with respect to the simple structure or other equivalent arrangements may be made without departing from the spirit of the utility model, and are intended to fall within the scope of the utility model as defined in the appended claims.

The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the utility model, and is not meant to limit the utility model thereto, but to limit the utility model thereto, and any modifications, equivalents, improvements and equivalents thereof may be made without departing from the spirit and principles of the utility model.

Claims (11)

1. The racket comprises a hitting part and a holding part connected with the hitting part, and is characterized in that the hitting part comprises a racket frame, a first surface layer, a second surface layer and an inner layer structure, the racket frame is provided with an inner wall and a containing space surrounded by the inner wall, the inner layer structure is arranged in the containing space and comprises an upper layer core material, a lower layer core material and at least one middle layer core material, the at least one middle layer core material is overlapped between the upper layer core material and the lower layer core material, the first surface layer is paved on the top surface of the upper layer core material and is connected with the upper edge of the racket frame, the second surface layer is paved on the bottom surface of the lower layer core material and is connected with the lower edge of the racket frame, and the rigidity of the upper layer core material is higher than that of the lower layer core material.

2. The slate racquet of claim 1, wherein the upper core and the lower core are made of different materials.

3. The board tennis racket according to claim 1, wherein the upper core and the lower core are both of a foam layer structure and are both made of the same material, and the upper core has a porosity smaller than that of the lower core.

4. A racquet according to claim 2 or 3, characterized in that the number of layers of the at least one intermediate layer core is one and the at least one intermediate layer core is a honeycomb board.

5. A slate racquet according to any one of claims 1 to 3, characterized in that the density of the upper layer core is greater than the lower layer core.

6. The racquet according to claim 1, wherein said upper core is a honeycomb panel and said honeycomb panel of said upper core has a plurality of upper hexagonal cells; the lower core material is also a honeycomb board, the honeycomb board of the lower core material is provided with a plurality of lower hexagonal units, the material of the upper core material is the same as that of the lower core material, and the size of each upper hexagonal unit is smaller than that of each lower hexagonal unit.

7. The tennis racket according to claim 2, wherein the upper core is a honeycomb board and the honeycomb board of the upper core has a plurality of upper hexagonal cells; the lower core material is also a honeycomb board, and the honeycomb board of the lower core material is provided with a plurality of lower hexagonal units, and the size of each upper hexagonal unit is equal to that of each lower hexagonal unit.

8. The slate racquet of claim 6 or 7, wherein the at least one intermediate layer core has one layer and the at least one intermediate layer core has a foam layer structure.

9. The slate racquet of claim 6 or 7, wherein the density of the upper core is greater than the density of the lower core.

10. The tennis racket according to claim 1, wherein said at least one middle layer core is bonded between said upper layer core and said lower layer core.

11. The board game racquet of claim 1, wherein the thickness of the striking portion is between 22 mm and 38 mm.