TWM647738U - Paddle tennis racket with multi-layer core material - Google Patents

Abstract

This invention describes a paddle tennis racket with a multi-layer core material, which includes a hitting part and a holding part. The hitting part includes a racket frame, a first surface layer, a second surface layer and an inner layer structure. The frame has an inner wall and an accommodation space surrounded by the inner wall. The inner structure is located in the accommodation space and includes an upper core material, a lower core material and at least one intermediate core material. The first surface layer and The second surface layer is respectively laid on the top surface of the upper core material and the bottom surface of the lower core material and both are connected to the racket frame. The rigidity of the upper core material is greater than that of the lower core material. Through the above-mentioned structural design of the paddle tennis racket, the forehand surface and the backhand surface of the paddle tennis racket can have different rigidities.

Description

Paddle tennis racket with multi-layer core material

This invention relates to a paddle tennis racket. Specifically, it refers to a paddle tennis racket with a multi-layer core material, the front and back surfaces of which have different rigidities.

Paddle tennis is a sport that uses a racket to hit the ball and is similar to tennis. Paddle tennis can be played in singles or doubles. The amount of activity and exercise is smaller than that of tennis. Therefore, it is suitable for people of all ages. In recent years, it has gradually become popular and popular. Popular with the general public.

The core material inside the traditional paddle tennis racket is uniform and made of a single core material. Therefore, the rigidity of the front and back sides of the traditional paddle tennis racket is the same, so it can be used with the same swing force and swing. At this angle, the power of the ball hit by the forehand surface and the backhand surface will be the same, so the player's playing style will be more limited during the game, reducing the excitement of the game.

One of the purposes of this creation is to provide a brand new structural design of a paddle tennis racket in which the rigidity of the forehand surface and the backhand surface are different.

The reason is that according to the invention, a paddle tennis racket with a multi-layer core material is provided, which includes a hitting portion and a grip portion connected to the hitting portion. The hitting portion includes a racket frame, a first surface layer, a second surface layer and an inner layer structure. The racket frame has an inner wall and an accommodating space surrounded by the inner wall. The inner structure is arranged in the accommodating space and includes an upper core material, a lower core material and at least one middle layer core material. Between the upper core material and the lower core material, the first surface layer is laid on the top surface of the upper core material and connected to the upper edge of the racket frame, the second surface layer is laid on the bottom surface of the lower core material and connected to the lower edge of the racket frame, and the upper core layer The rigidity of the material is greater than the underlying core material. Through the structural design of the above-mentioned paddle tennis racket, the power of the ball hit by the forehand surface (for example, the side corresponding to the upper core material) and the backhand surface (such as the side corresponding to the lower core material) is different, allowing the player to use Counterattack powerfully with the forehand side, or use the backhand side to control the ball and lob, allowing players to have more diverse playing styles during the game to increase the excitement of the game.

In one aspect, the upper core material can be made of a different material than the lower core material, so that the upper core material and the lower core material have different rigidities through different materials.

On the other hand, the upper core material can also be made of the same material as the lower core material, but both the upper core material and the lower core material have a foam layer structure and the upper core material and the lower core material are both made of the same material. The material is made of foam. The porosity of the upper core material is smaller than that of the lower core material. Through different porosity, the rigidity of the upper core material and the lower core material can be effectively controlled.

In another aspect, the number of layers of the middle layer core material may be one layer, and the middle layer core material may be a honeycomb panel.

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

On the other hand, the inner structure may also adopt other structural designs. Specifically, the upper core material can be a honeycomb panel and the honeycomb panel of the upper core material has a plurality of upper hexagonal units, and the lower core material can also be a honeycomb panel and the honeycomb panel of the lower core material has a plurality of lower hexagonal units. The material of the upper core material is the same as the material of the lower core material, and the size of each upper hexagonal unit is smaller than the size of each lower hexagonal unit. Through different sizes of hexagonal units, the rigidity of the upper core material and the lower core material can be effectively controlled.

In another aspect, the upper core material can be a honeycomb panel and the honeycomb panel of the upper core material has a plurality of upper hexagonal units, and the lower core material can also be a honeycomb panel and the honeycomb panel 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. Simply by using different materials, the upper core material and the lower core material can still have different rigidities.

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

On the other hand, the thickness of the striking portion is between 22 mm and 38 mm to comply with paddle tennis racket specifications.

First of all, it should be noted that the technical features provided by the present invention are not limited to the specific structures, purposes and applications described in the embodiments. The terms used in the description are all exemplary descriptive terms that can be understood by those with ordinary knowledge in the technical field. The terms "front", "upper", "lower", "rear" and "left" mentioned in this specification Directional descriptive terms such as , "right", "top", "bottom", "inside", and "outside" are only illustrative descriptive terms based on normal usage directions and are not intended to limit the scope of claims.

In order to explain in detail the technical characteristics of this invention, the following four embodiments are cited and described with drawings, among which:

As shown in Figures 1 to 4, the first embodiment provides a paddle tennis racket 1, which includes a hitting portion 10 and a grip portion 20 connected to the hitting portion 10. The hitting portion 10 is a paddle tennis racket 1 The part used for hitting the ball is based on the drawing of Figure 3. The hitting part 10 has a top surface 11 and a bottom surface 12. The top surface 11 and the bottom surface 12 can be used as the forehand surface and the backhand surface respectively. Of course, , in some situations, it is also possible to use the top surface 11 of the hitting part 10 as the backhand surface and the bottom surface 12 of the hitting part 10 as the forehand surface, so it should not be limited to this embodiment. Normally, the thickness of the hitting portion 10 (that is, the distance between the top surface 11 and the bottom surface 12) is between 22 and 38 millimeters (mm) to comply with paddle tennis racket specifications. The hitting part 10 structurally includes a racket frame 13, a first surface layer 14, an inner layer structure 15 and a second surface layer 16. The racket frame 13 is made of a carbon fiber reinforced composite material that is softened after being heated under pressure, thereby causing a bridging reaction and solidifying. The interior 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 it to form a generally diamond-shaped accommodation space. The inner structure 15 is provided in the above-mentioned accommodation space. The first surface layer 14 and the second surface layer 16 are parts used for direct contact with the sphere. 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 cured and formed, , the first surface layer 14 will be integrally connected to the upper edge of the racket frame 13 , and the second surface layer 16 will be integrally connected to the lower edge of the racket frame 13 .

The inner layer structure 15 is provided between the first surface layer 14 and the second surface layer 16. The inner layer structure 15 includes an upper core material 151, a lower core material 153 and a middle core material 152 stacked on the upper core material 151 and the second surface layer 15. Between the lower core materials 153, the upper core material 151 is used to withstand the impact of the forehand surface, and the first surface layer 14 is laid on the top surface of the upper core material 151. The upper core material 151 is a foam layer structure, which is made of foamed EVA material (ethylene/vinyl acetate copolymer, Ethylene-Vinyl Acetate). The Shore hardness of the EVA material is Shore A 10-25 degrees. The upper core material 151 has lower porosity and higher overall density. Therefore, the upper core material 151 has higher rigidity and therefore has higher ability to resist deformation, thereby affecting the hitting feel. The middle layer core material 152 is used to provide a supporting effect. In this embodiment, the number of layers of the middle layer core material 152 is only one. The number of layers of the middle layer core material 152 can be adjusted according to actual needs. The middle layer core material 152 is a honeycomb board in this embodiment, and the honeycomb board can be made of aluminum plate, cardboard or PP board (polypropylene). The top and bottom surfaces of the middle layer core material 152 are bonded between the upper layer core material 151 and the lower layer core material 153 through adhesive. The lower core material 153 is used to withstand the impact of the backhand surface, and the second surface layer 16 is laid on the bottom surface of the lower core material 153 . The lower core material 153 is also a foam layer structure and is made of PU (Polyurethane) foam material. The lower core material 153 has a higher porosity (higher foaming ratio) and lower overall density. As a result, the upper core material 151 has lower rigidity as a whole. In addition, as shown in FIGS. 1 and 4 , the hitting portion 10 is also provided with a plurality of through holes 17 , each of the through holes 17 penetrates the first surface layer 14 , the inner structure 15 and the second surface layer 16 , so that the airflow can pass through the hitting portion smoothly. The ball portion 10 is used to reduce wind resistance.

The grip part 20 is used for the user to hold, and the grip part 20 is integrally connected with the racket frame 13 . In addition, the grip portion 20 is also covered with a grip tape 21 to prevent slipping and shockproofing.

Since the upper core material 151 and the lower core material 153 are made of different foam materials, and by adjusting the porosity and overall density of the upper core material 151 and the lower core material 153, the porosity of the upper core material 151 is smaller than that of the lower core material 153. The core material 153 (lower foaming ratio) and the overall density of the upper core material 151 is greater than the lower core material 153, so that the rigidity of the upper core material 151 will be greater than that of the lower core material 153. Through this structural design, the ball hit by the player using the higher rigidity forehand surface will have higher power, which facilitates the player to use the forehand surface to return the ball powerfully. On the other hand, the force of the ball hit by a player using a less rigid backhand surface will be lower, allowing the player to use the backhand surface to control the ball and lob the ball, so players can have more diverse playing styles during competitions. , in order to increase the excitement of the competition.

This invention also provides a second embodiment, please refer to Figure 5 . The structure of the paddle tennis racket 1' of the second embodiment is roughly the same as that of the paddle tennis racket 1 of the first embodiment. One difference is that the upper core material 151 and the lower core material 153 of the second embodiment are both made of EVA material. It is foamed, but the porosity of the upper core material 151 is smaller than the porosity of the lower core material 153. By adjusting different porosity, the rigidity of the upper core material 151 can still be greater than that of the lower core material 153.

This invention also provides a third embodiment, please refer to Figure 6 . The structure of the paddle tennis racket 1'' of the third embodiment is roughly the same as that of the paddle tennis racket 1 of the first embodiment. The difference lies in that the upper core material 151 of the third embodiment is a honeycomb board and the upper core material 151 The honeycomb panel has a plurality of upper hexagonal units UT, each upper hexagonal unit UT is a regular hexagon in cross section, and the upper hexagonal units UT are connected to each other. The upper core material 151 is made of aluminum plate. The number of layers of the middle layer core material 152 is one layer, and the middle layer core material 152 is made of foamed EVA material. The lower core material 153 is also made of aluminum plate. The lower core material 153 is also a honeycomb panel, and the honeycomb panel of the lower core material 153 has a plurality of lower hexagonal units UB. Each lower hexagonal unit UB is a regular hexagon in cross section, and the lower hexagonal units UB are mutually exclusive. are connected, 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 material 151 is the same as the material of the lower core material 153, by adjusting the sizes of the upper hexagonal unit UT and the lower hexagonal unit UB of the honeycomb panel, the rigidity of the upper core material 151 can still be made greater than that of the lower core material. 153 rigidity.

This invention also provides a fourth embodiment, please refer to Figure 7 . The structure of the paddle tennis racket 1''' of the fourth embodiment is roughly the same as that of the paddle tennis racket 1'' of the third embodiment. The difference is that the upper core material 151 is a honeycomb panel made of aluminum plates, and the lower core material 151 is a honeycomb panel made of aluminum plates. The core material 153 is a honeycomb panel made of PP board, and the size of each upper hexagonal unit UT of the honeycomb panel of the upper core material 151 is equal to the size of each lower hexagonal unit UB of the honeycomb panel of the lower core material 153 . Through the difference in materials, the rigidity of the upper core material 151 can still be greater than that of the lower core material 153 .

Finally, it must be stated again that the methods and components disclosed in the foregoing embodiments of the present invention are only examples and are not intended to limit the patent scope of the present invention. Simple structural modifications are made without departing from the spirit of the present invention. Or changes, or replacement with other equivalent components, should still fall within the scope of the patent application for this utility model.

1,1’,1’’,1’’’: paddle tennis racket 10: Batting department 11:Top surface 12: Bottom surface 13: Frame 131:Inner wall 14: First surface layer 15:Inner structure 151: Upper core material 152:Middle layer core material 153: Lower core material 16:Second surface layer 17:Through hole 20: Grip part 21: Grip strap UT: upper hexagonal unit UB: lower hexagonal unit

The detailed structure and features of the paddle tennis racket described in the following embodiments will be described in the following embodiments. However, it should be understood that the embodiments and drawings described below are only for illustrative purposes and do not should be used to limit the patentable scope of this creation, where:

Figure 1 is a perspective view of the paddle tennis racket according to the first embodiment; Figure 2 is a top view of Figure 1; Figure 3 is a partial perspective cross-sectional view of Figure 1; Figure 4 is a cross-sectional view drawn along line 4-4 in Figure 2; Figure 5 is a cross-sectional view of the paddle tennis racket according to the second embodiment; Figure 6 is a partial perspective cross-sectional view of the paddle tennis racket according to the third embodiment; and Fig. 7 is a partial perspective cross-sectional view of the paddle tennis racket according to the fourth embodiment.

1: Cricket racket

10: Batting department

11:Top surface

12: Bottom surface

13: Frame

131:Inner wall

14: First surface layer

15:Inner structure

151: Upper core material

152:Middle layer core material

153: Lower core material

16:Second surface layer

Claims (11)

A paddle tennis racket with a multi-layer core material, including a hitting part and a grip part connected to the hitting part. The hitting part includes a racket frame, a first surface layer, a second surface layer and an inner layer structure. , the racket frame has an inner wall and an accommodating space formed by the inner wall. The inner structure is located in the accommodating space and includes an upper core material, a lower core material and at least one middle layer. Core material, the at least one middle layer core material is stacked between the upper layer core material and the lower layer core material, the first surface layer is laid on the top surface of the upper layer core material and connected to the upper edge of the racket frame, and the third surface layer The two surface layers are laid on the bottom surface of the lower core material and connected to the lower edge of the racket frame. The rigidity of the upper core material is greater than that of the lower core material. The paddle tennis racket of claim 1, wherein the upper core material and the lower core material are made of different materials. The paddle tennis racket according to claim 1, wherein both the upper core material and the lower core material have a foam layer structure and the upper core material and the lower core material are made of the same foamed material, and the The porosity of the upper core material is smaller than the porosity of the lower core material. The paddle tennis racket according to claim 2 or 3, wherein the number of layers of the at least one middle layer core material is one layer, and the at least one middle layer core material is a honeycomb board. The paddle tennis racket according to any one of claims 1 to 3, wherein the density of the upper core material is greater than that of the lower core material. The paddle tennis racket of claim 1, wherein the upper core material is a honeycomb panel and the honeycomb panel of the upper core material has a plurality of upper hexagonal units; the lower core material is also a honeycomb panel and the lower core material The honeycomb panel is made of material and has a plurality of lower hexagonal units, the material of the upper core material is the same as the material of the lower core material, and the size of each upper hexagonal unit is smaller than the size of each lower hexagonal unit. The paddle tennis racket of claim 2, wherein the upper core material is a honeycomb panel and the honeycomb panel of the upper core material has a plurality of upper hexagonal units; the lower core material is also a honeycomb panel and the lower core material The honeycomb panel is made of material and has a plurality of lower hexagonal units, and the size of each upper hexagonal unit is equal to the size of each lower hexagonal unit. The paddle tennis racket according to claim 6 or 7, wherein the number of layers of the at least one middle layer core material is one layer, and the at least one middle layer core material is a foam layer structure. The paddle tennis racket according to claim 6 or 7, wherein the density of the upper core material is greater than that of the lower core material. The paddle tennis racket of claim 1, wherein the at least one middle layer core material is bonded between the upper core material and the lower core material. The paddle tennis racket of claim 1, wherein the thickness of the hitting portion is between 22 mm and 38 mm.

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