JP3098026U - Badminton racket - Google Patents

Abstract

An object of the present invention is to provide a badminton racket that improves the feel of hitting a racket.
The badminton racket has a cylindrical shaft, and the shaft is tapered from a front end to a rear end. The outer diameter of the front end 21 is 7.0 mm or less, and the outer diameter B of the rear end 22 is 7.0 mm or more. Further, the outer diameter is desirably 5.5 mm to 7.0 mm, and the outer diameter B is desirably 7.0 mm to 8.0 mm. Therefore, the elasticity increases as the position approaches the front end 21 and the rigidity increases as the position approaches the rear end 22, so that the speed at the time of hitting the ball and the shot line are improved.
[Selection diagram] Fig. 1

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to exercise equipment, and more particularly to a badminton racket having extremely excellent hitting characteristics.
[0002]
[Prior art]
Many of the current common badminton rackets are made of a composite fiber material (such as a carbon fiber composite material), and FIG. 3 shows a type of conventional badminton racket 90. The badminton racket 90 includes a shaft 92 and a head frame 94 connected to a front end of the shaft. A grip 96 is joined to the rear end of the shaft 92, and a gut surface is formed by applying a gut to the head frame 94, thereby forming a badminton racket.
[0003]
In the conventional badminton racket, the shaft 92 has a straight pipe shape, and its outer diameter can be divided into both types of 7.0 mm or 7.5 mm. Generally, under the same other conditions, the larger the shaft outer diameter, the higher the rigidity and the better the anti-torsion strength. However, the bending elasticity is relatively low. Conversely, as the outer diameter of the shaft becomes smaller, the elasticity can be improved, but the rigidity and the anti-torsional strength also become relatively lower. In other words, when comparing two shafts having different outer diameters, characteristics such as stiffness, anti-torsion strength, and bending elasticity have different lengths, and there is no absolutely ideal thickness. In other words, if the characteristics of one side of the racket are prioritized, the other characteristics will be relatively weakened at the same time.
[0004]
In addition to the magnitude of the force at the time of hitting the ball, it also affects the position of the "kick point" of the shaft and the "swing weight". , Its power arm is longer and the shot line of the hit ball is stronger. Therefore, the better the rebound point is closer to the front end and the greater the swing weight, the better the characteristics of each item and how to improve the shot feeling have been pursuing goals in this industry for a long time.
[0005]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks, a main object of the present invention is to provide a badminton racket in which various characteristics are harmonized and the hitting feel of the racket is further improved. Another object of the present invention is to provide a badminton racket that can increase the swing weight and move the rebound point significantly forward.
[0006]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the badminton racket provided by the present invention is made of a composite fiber material, has one shaft and one head frame, and has one connection part at the front end of the shaft and the head frame. The shaft is a conical pipe body, the outer diameter of the front end of which is smaller than 7.0 mm (preferably 5.5 mm to 7.0 mm), and the outer diameter of the rear end is larger than 7.0 mm. (7.0 mm to 8.0 mm is preferable). As a result, the badminton racket has extremely excellent hitting characteristics.
[0007]
[Embodiment of the invention]
In order to further clarify the features of the present invention, the following is a comparatively superior embodiment and a combination of the drawings.
As shown in FIGS. 1 and 2, a relatively excellent badminton racket 10 according to an embodiment of the present invention is made of a composite fiber material (such as a carbon fiber composite material), and has one shaft 20 and one head. A head (head frame) 30 is provided. The shaft 20 has a single pipe body, and has a connecting portion 24 at a front end 21 thereof, which is connected to the head frame 30. The outer diameter of the connecting portion 24 is larger than the front end of the shaft 20. The head frame 30 has a generally elliptical shape, and forms a gut surface 50 therein by being gutted. One grip 40 can be connected to the rear end of the shaft 20, thus forming one badminton racket.
[0008]
Among them, the shaft 20 is a single conical pipe body, the front end 21 of which is relatively thin, the outer diameter A is 7.0 mm or less, and between 5.5 mm and 7.0 mm at the time of manufacture. Is good. The rear end 22 of the shaft 20 is relatively thick, the outer diameter B is equal to or greater than 7.0 mm, and is preferably between 7.0 mm and 8.0 mm during manufacturing. From the front end 21 to the front end 21. Further, the shaft 20 can be in a state where the core is clogged as necessary.
[0009]
To explain this in particular, in the badminton racket manufactured from the conventional composite fiber material, the shaft outer diameters are all 7.0 mm or more, and it was possible to provide sufficient anti-torsion strength and rigidity. At times, the hitting surface was prevented from shaking or breaking. In one embodiment of the present invention, the outer diameter of the front end of the shaft is limited to 7.0 mm or less, which is not seen in the conventional structure, and the required level of the manufacturing technology is extremely high, and it has never been so excellent. In addition to being able to provide elasticity, when the process is actually tested, its stiffness and anti-torsional strength will exceed ordinary standards, but the method and technical theory of this racket are the purpose of the present invention. This is not the place to be, and I will not explain it.
[0010]
In addition, the front end 21 of the shaft 20 of the badminton racket 10 according to the embodiment of the present invention is relatively thin, and the rear end 22 is relatively thick. Therefore, the closer the shaft 20 is to the front end, the more excellent its elasticity and the rear end are. The closer the distance is, the higher the rigidity becomes, and when actually swinging and hitting the ball, the shaft 20 helps to improve the speed at hitting and the shot line.
[0011]
Furthermore, since the front end of the shaft 20 is relatively thin and the rear end is relatively thick, the total weight is the same. However, when compared with a shaft having a uniform outer diameter, the badminton racket according to one embodiment of the present invention has the same shape as the shaft 20. "Kick point" is relatively close to the front end, making the shot line stronger when hitting a ball, and at the same time, relatively increasing the "swing weight" of the racket (Note: In actual tests, the swing weight of one embodiment of the present invention reaches 86 or more, which is about 10% greater than that of a typical conventional racket of 80 to 82).
[0012]
The badminton racket 10 according to an embodiment of the present invention generally has better feelings such as rigidity, anti-torsion strength and bending elasticity of the shaft 20 than the conventional structure, and at the same time, this structure exerts more power when hitting the racket. And the shot speed and shot line become more aggressive.
[Brief description of the drawings]
FIG. 1 is a schematic view of a badminton racket according to an embodiment of the present invention.
FIG. 2 is a sectional view taken along line 2-2 of FIG.
FIG. 3 is a schematic view of a conventional badminton racket.
[Explanation of symbols]
Reference Signs List 10 badminton racket 20 shaft 21 front end 22 rear end 24 connection part 30 head frame 40 grip 50 gut surface

Claims (4)

A badminton racket,
Made of composite fiber material,
With a shaft and a head frame,
There is a connecting part at the front end of the shaft, it is connected to the head frame, it is possible to connect the grip to the rear end of the shaft, it is possible to put a gut on the head frame,
A badminton racket, wherein the shaft has a conical pipe shape, and an outer diameter at a front end thereof is 7.0 mm or less, and an outer diameter at a rear end thereof is 7.0 mm or more. The badminton racket according to claim 1, wherein the outer diameter of the front end of the shaft is set between 5.5 mm and 7.0 mm. The badminton racket according to claim 1, wherein the outer diameter of the rear end of the shaft is set between 7.0 mm and 8.0 mm. The badminton racket according to claim 1, wherein the magnitude of the outer diameter of the shaft changes gradually and continuously from the rear end to the front end.

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