TWM585645U - Beach tennis racket - Google Patents

Abstract

A beach tennis racket includes an integrally formed impact portion and a grip portion. The impact portion includes a first surface sheet of the impact portion, a second surface sheet of the impact portion, a foam core material, and a tubular structure of the impact portion. ; The grip part includes a first surface sheet of the grip part, a second surface sheet of the grip part, and a tubular structure of the grip part; the new model replaces the existing EVA core material with a heat-resistant at least 150 ^o C PU foam core material to avoid the problem of core material thermal expansion and contraction, combined with compression molding and blow molding technology to achieve the effect of one-piece molding, greatly improving the problem of poor bonding of existing technology interface molding, is a novel and novel Durable product.

Description

Beach Tennis Racket

A tennis racket, especially a tennis racket suitable for beach tennis.

In recent years, a new sport of beach tennis has emerged. This sport is mainly to set up the same tennis net on the beach as ordinary tennis. It is surrounded by the sun, the beach, the white clouds and the sun. And competitive. This kind of sport is easy to learn and suitable for all ages. Therefore, it has become popular all over the world and has international recognition. It is loved by many fans.

Existing beach tennis rackets are mainly made of surface fiber composite material covering foam core material. Common surface fiber composite material is carbon fiber prepreg, and the core material is generally ethylene vinyl acetate (EVA) foam material. However, such materials as EVA have the characteristics of thermal expansion and contraction, which may easily cause a gap between the outer surface fiber composite material and the core material, and the problem of poor bonding of product interface molding.

In order to solve the problem that the surface fiber composite material and the core material of the beach tennis racket are liable to cause poor interface bonding due to material factors, the present invention provides a beach tennis racket, which includes an integrally formed hitting portion and a grip portion, wherein : The striking part includes a first surface sheet of the striking part, a second surface sheet of the striking part, a foamed core material and a tubular structure of the striking part; the foamed core material plate and the tubular structure of the striking part are sandwiched between the striking parts Between the first surface sheet and the second surface sheet of the striking part, the striking part tubular structure surrounds the periphery of the foamed core material board and the diameter of the striking part tubular structure is equal to the thickness of the foamed core material; and the grip The handle part includes a first surface sheet of the grip part, a second surface sheet of the grip part, and a grip part tubular structure, and the grip part tubular structure is sandwiched between the first surface sheet of the grip part and the grip part Between the second surface pieces; the first surface piece of the grip portion, the second surface piece of the grip portion, and the tubular structure of the grip portion are respectively from the first surface piece of the striking portion, the second surface piece of the striking portion, the Strike tubular structure extension Come.

Among them, the striking part is provided with several perforations.

The striking portion tubular structure and the grip portion tubular structure are wound into a tubular shape by a fiber prepreg, and the surface includes a resin, and the resin is an epoxy resin.

Wherein the foam core panel is made may be at least 150 ^o C heat-resistant polyurethane foam material.

The foamed core material plate is provided with a plurality of core material perforations corresponding to the perforation positions.

The first surface sheet of the striking part, the second surface sheet of the striking part, the first surface sheet of the grip part, and the second surface sheet of the grip part are made of fiber composite material.

The fiber composite material includes a carbon fiber woven composite material, a carbon fiber prepreg, or a unidirectional carbon fiber prepreg.

From the above description, it can be seen that the new type of EVA core material is replaced by a polyurethane (PU) foam core material that can withstand heat of at least 150 ^o C to avoid the problem of core material thermal expansion and contraction. Combining compression molding and blow molding The technology of bag forming achieves the effect of one-piece forming, which greatly improves the problem of poor combination of existing technology interface forming, and is a novel and durable product.

Please refer to FIG. 1, which is a schematic diagram of a preferred embodiment of a beach tennis racket 10. The beach tennis racket 10 includes an integrally formed striking portion 11 and a grip portion 13. The striking portion 11 is preferably provided with several perforations. 20. The grip portion 13 of the beach tennis racket 11 is used by a user to grip and interlock the striking portion 11 to hit a ball (not shown), which then causes the ball to rebound. In addition to reducing the weight of the beach tennis racket 10, the perforation 20 can be used to reduce wind resistance because the new type is mainly used on the beach.

Wherein, the striking portion 11 of the beach tennis racket 10 has an oval plate-like sheet material structure, and the shape is similar to a general tennis racket. Please further refer to FIG. 2, the structure of which includes a first surface sheet 111 and a second surface sheet 113, which are disposed on one surface of the sheet material structure, the first surface sheet 111 and the second surface of the impact section. The sheet 113 has the same or nearly the same shape and size, and the material is a fiber composite material, such as a carbon fiber woven composite material, a carbon fiber prepreg, or a unidirectional carbon fiber prepreg.

Between the first surface sheet 111 of the striking part and the second surface sheet 113 of the striking part, a foamed core material board 115 and a striking part tubular structure 117 surrounding the periphery of the foamed core material board 115 are sandwiched. The shape of the foamed core material plate 115 corresponds to the first surface sheet 111 of the striking part and the second surface sheet 113 of the striking part but is slightly smaller. It is preferably made of polyurethane (PU) that can withstand heat of at least 150 ^o C. It is made of foam material, and a plurality of core material perforations 1151 can be provided corresponding to the 20 positions of the perforations. The striking portion tubular structure 117 surrounds the outer periphery of the foamed core plate 115 and the striking portion tubular structure 117 The diameter is equivalent to the thickness of the foamed core material 115, so that the size of the foamed core material plate 115 can be equal to the first surface sheet 111 and the second surface sheet 113 of the striking portion, and the striking portion has a tubular structure. The 117 series is wound into a tubular shape by a fiber prepreg and the surface contains a resin, preferably an epoxy resin.

Please continue to refer to FIG. 1 and FIG. 2 with reference to FIG. 3. The grip portion 13 is of a long tubular shape, and the connection portion with the striking portion 11 is preferably connected to each other in a Y-shaped structure, and a connection hole 30 is formed. The connection hole 30 can also achieve the effect of reducing the weight of the novel model. The grip part 13 includes a grip part first surface sheet 131 and a grip part second surface sheet 133. The grip part first surface sheet 131 and the grip part second surface sheet 133 are respectively from the strike The first surface sheet 111 extends from the second surface sheet 113 of the striking part and is integrally formed into a tubular shape. The material is a fiber composite material, such as a carbon fiber woven composite material, a carbon fiber prepreg material, or a unidirectional carbon fiber prepreg material. A grip portion tubular structure 135 is also sandwiched between the two, which also extends from the striking portion tubular structure 117 and is connected to each other. The grip portion tubular structure 135 is wound by a fiber prepreg. Tubular type and the surface contains a resin, preferably an epoxy resin.

The new technology combines the molding and blow-molding techniques in the manufacturing process. A specific method and method for realizing the process include: firstly striking the first surface sheet 111 and the second surface sheet of the striking part. 113. The fiber composite material of the first surface sheet 131 of the grip part and the second surface sheet 133 of the grip part is first formed into two shells. The striking tubular structure 117 and the grip tubular structure 135 are wound on the surface of an airbag using a fiber prepreg. Then, the two shells are laid on the inner surface of a mold corresponding to the shape of the beach tennis racket 10, and the foam core plate 115, the striking portion tubular structure 117, and the grip portion tubular structure 135 together with The air bag is sandwiched between the two shells, and then the air bag is inflated (as shown in FIG. 2) while being molded, so that the air bag can support and assist in forming the externally wound fiber prepreg, and the blow The tubular structure 117 and the grip tubular structure 135 are formed by being wound with a fiber prepreg, and the surface of the fiber prepreg contains resin, so the first surface sheet 111 and the second surface of the striking part can be formed. The sheet 113, the first surface sheet 131 of the grip part, the second surface sheet 133 of the grip part, and the foamed core material plate 115 are adhered and solidified to form an integrated structure.

The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the rights of the present invention. All other equivalent changes or modifications made without departing from the spirit of the present invention shall be included in the claims of the new invention. Within range.

10‧‧‧ Beach Tennis Racket

11‧‧‧ Strike Department

111‧‧‧ First surface sheet

113‧‧‧ Second surface sheet

115‧‧‧Foam core board

1151‧‧‧ Core perforation

117‧‧‧Tube Structure

13‧‧‧ Grip Department

131‧‧‧ First surface sheet of grip

133‧‧‧ second surface sheet

135‧‧‧Grip tubular structure

20‧‧‧ perforation

30‧‧‧ connection hole

FIG. 1 is a schematic diagram of a finished product according to a preferred embodiment of the present invention.
FIG. 2 is a perspective view of a preferred embodiment of the present invention.
FIG. 3 is a partially exposed schematic diagram of a preferred embodiment of the present invention.

Claims (8)

A beach tennis racket includes an integrally formed hitting portion and a grip portion, wherein:
The striking part comprises a striking first surface sheet, a striking second surface sheet, a foam core material and a striking part tubular structure; the foam core material plate and the striking part tubular structure are sandwiched between the striking part Between the first surface sheet and the second surface sheet of the striking part, the striking part tubular structure surrounds the periphery of the foamed core material board and the diameter of the striking part tubular structure is equivalent to the thickness of the foamed core material; and the grip The part includes a first surface sheet of the grip part, a second surface sheet of the grip part, and a grip part tubular structure. The grip part tubular structure is sandwiched between the first surface sheet of the grip part and the first part of the grip part. Between two surface pieces; the first surface piece of the grip portion, the second surface piece of the grip portion, and the tubular structure of the grip portion are respectively from the first surface piece of the striking portion, the second surface piece of the striking portion, and the striking The tubular structure extends. For example, a beach tennis racket with the scope of patent application No. 1 is provided with several perforations on the striking part. For example, the beach tennis racket of item 1 of the patent application scope, the striking portion tubular structure and the grip portion tubular structure are wound into a tubular shape by a fiber prepreg and the surface contains resin. For example, the beach tennis racket for item 3 of the patent application scope, the resin is epoxy resin. For example, the beach tennis racket for item 1 of the scope of patent application, the foam core board is made of polyurethane foam that can withstand at least 150 ^o C. For example, a beach tennis racket for item 5 of the scope of patent application, a plurality of core material perforations are provided on the foamed core material board corresponding to the perforation positions. For example, the beach tennis racket of the first scope of the patent application, the first surface sheet of the striking part, the second surface sheet of the striking part, the first surface sheet of the grip part and the second surface sheet of the grip part are made of fiber composite material. For example, the beach tennis racket for item 7 of the patent application scope, the fiber composite material includes carbon fiber woven composite material, carbon fiber prepreg material or unidirectional carbon fiber prepreg material.