TENNIS RACKET HAVING FILLER THEREIN
A tennis racket includes a tubular body and a bridge member. The tubular body has a first tubular member and a second tubular member. The first and second tubular members each have a grip portion, a neck portion, and a frame portion. The interior of the tubular body is divided into a first chamber, a second chamber, and a central chamber by two partition walls disposed in the tubular body. Two fillers are disposed in the first and second chambers respectively. The bridge member is a solid structure connected with the two frame portions of the tubular body. By means of the aforesaid arrangement, the structural strength of the tennis racket is enhanced, and the shock-absorbing effect is provided by the fillers.
The present invention relates to a tennis racket and more particularly, to a tennis racket, which is defined in the IPC group A63B49/00.
2. Description of the Related ArtIn order to realize the lightweight of a tennis racket made of a fiber reinforced material, a head frame of the tennis racket has a hollow annular shape. The ring-shaped head frame creates a long existing problem of structural weaknesses, such that the head frame is damaged easily when the tennis racket is swung by a user. On the other hand, as far as the tennis string tension is concerned, it keeps increasing to meet requirements for players, resulting in that the head frame is more easily to be deformed by a higher string tension. This highlights a problem of insufficient strength in the conventional tennis racket.
SUMMARY OF THE INVENTIONIt is an objective of the present invention to provide a tennis racket, which has an enhanced structural strength.
To attain the above objective, the present invention provides a tennis racket defines an imaginary central axis and comprises a tubular body and a bridge member. The tubular body has a first tubular member and a second tubular member. The first tubular member is provided with a first grip portion, a first neck portion, and a first frame portion. The first neck portion has two opposite ends thereof connected integrally with the first grip portion and the first frame portion. The second tubular member is provided with a second grip portion, a second neck portion, and a second frame portion. The second neck portion has two opposite ends thereof connected integrally with the second grip portion and the second frame portion. The first and second grip portions both extend along the central axis and are connected with each other. An end of the first frame portion located opposite to the first grip portion is connected with an end of the second frame portion located opposite to the second grip portion. The bridge member is a solid structure with two opposite ends thereof connected with the first and second frame portions. Further, the tubular body has an outer periphery wall, an inner periphery wall, a first partition wall connected between the outer periphery wall and the inner periphery wall, and a second partition wall connected between the outer periphery wall and the inner periphery wall, such that the interior of the tubular body is divided into a central chamber, a first chamber, and a second chamber. The first and second chambers are located at two opposite sides of the central chamber and each have a filler therein.
It can be understood from the above illustration that the tubular body is manufactured integrally to enhance its structural strength. Further, due to the first and second partition walls, the structure of the tubular body is reinforced to allow the first and second frame portions to bear a higher string tension.
On one hand, the first and second grip portions are spaced from each other and combined together by a connection strip in such a manner that a gap is formed between the first and second grip portions. By means of the gap, a grip sleeve can be sleeved conveniently onto the first and second grip portions.
On another hand, the connection strip is a stepped structure with a first section and a second section. The first section is closer to the first and second neck portions than the second section. Further, the first section is connected with the entire surface of the inner periphery wall of the first grip portion and the entire surface of the inner periphery wall of the second grip portion, and the second section is connected with the partial surface of the inner periphery wall of the first grip portion and the partial surface of the inner periphery wall of the second grip portion. By means of the steeped structure, the grip can be tightly attached to the first and second grip portions.
On another hand, the outer surface of the first section is flushed with the outer surfaces of the first and second neck portions.
On another hand, the inner periphery wall of the first grip portion is directly connected with the inner periphery wall of the second grip portion without using the connection strip. By this way, the grip sleeve can be also sleeved onto the first and second grip portions.
Referring to
The tubular body 10 is made from a composite material, such as fiber reinforced resin. For the fiber used in the composite material, carbon fiber, glass fiber, boron fiber or Kevlar fiber can be used. For the resin used in the composite material, thermoplastic resin or thermosetting resin can be used. The tubular body 10 has a first tubular member 11 and a second tubular member 12. The first and second tubular members 11 and 12 are located at two sides of the central axis A and symmetrical with respect to the central axis A. As shown in
As shown in
Further, the first and second chambers 15 and 16 each have a filler 40 therein. The filler 40 can be made of a foam material for providing a vibration absorbing effect and structural strengthening effect. In the present embodiment, the filler 40 is made of PU; however, the filler 40 can be made of EVA for providing a vibration absorbing effect and reducing a ball striking force.
It is worth mentioning that once the tennis racket 1 drops into water accidentally or works in high-humidity environment, the water may seep in the tubular body 10. Even if the water enters the central chamber 17, it won't be absorbed by the fillers 40 disposed in the first and second chambers 15 and 16 for preventing the tennis racket 1 from gaining weight. Thus, not only the vibration absorption capability, but also the waterproof capability is provided by the tennis racket 1.
Referring to
Referring to
Base on the spirit of the present invention, the length, thickness, and location of the first and second partition walls 13 and 14 can be provided with various kinds of design according to actual needs.
As shown in
Claims
1. A tennis racket defining an imaginary central axis and comprising:
- a tubular body having a first tubular member and a second tubular member, said first and second tubular members being connected integrally with each other and located at two sides of said central axis, said first tubular member having a first grip portion, a first frame portion, and a first neck portion having two opposite ends thereof connected integrally with said first grip portion and said first frame portion respectively, said second tubular member having a second grip portion, a second frame portion, and a second neck portion having two opposite ends thereof connected integrally with said second grip portion and said second frame portion respectively, said first and second grip portions both extending along said central axis and connected with each other, an end of said first frame portion located opposite to said first grip portion being connected with an end of said second frame portion located opposite to said second grip portion; and
- a bridge member having two opposite ends thereof connected with said first and second frame portions respectively;
- wherein said tubular body has an outer periphery wall, an inner periphery wall, a first partition wall connected between said outer periphery wall and said inner periphery wall, and a second partition wall connected between said outer periphery wall and said inner periphery wall, such that an interior of said tubular body is divided into a central chamber, a first chamber, and a second chamber;
- wherein said first and second chambers are located at two opposite sides of said central chamber, and two fillers are disposed in said first and second chambers respectively.
2. The tennis racket as claimed in claim 1, wherein said bridge member is a solid structure.
3. The tennis racket as claimed in claim 1, wherein said first and second grip portions are spaced from each other and combined together by a connecting strip in such a way that a gap is formed between said first and second grip portions.
4. The tennis racket as claimed in claim 3, wherein said connecting strip is a stepped structure with a first section and second section; said first section is closer to said first and second neck portions than said second section; said first section is connected with an entire surface of said inner periphery wall of said first grip portion and an entire surface of said inner periphery wall of said second grip portion, and said second section is connected with a partial surface of said inner periphery wall of said first grip portion and a partial surface of said inner periphery wall of said second grip portion.
5. The tennis racket as claimed in claim 4, wherein an outer surface of said first section is flushed with outer surfaces of said first and second neck portions.
6. The tennis racket as claimed in claim 1, wherein said inner periphery wall of said first grip portion is directly connected with said inner periphery wall of said second grip portion.
Type: Application
Filed: Mar 27, 2019
Publication Date: Oct 1, 2020
Inventor: JING-BIN CHIANG (TAICHUNG CITY)
Application Number: 16/366,349