WO2010058992A2

WO2010058992A2 - Sports racket for playing in narrow indoor spaces

Info

Publication number: WO2010058992A2
Application number: PCT/KR2009/006849
Authority: WO
Inventors: 김상웅
Original assignee: Kim Sang-Woong
Priority date: 2008-11-20
Filing date: 2009-11-20
Publication date: 2010-05-27
Also published as: JP2012509132A; WO2010058992A3; KR200443747Y1; CN102223926A

Abstract

The present invention relates to a sports racket for playing in narrow indoor spaces. The racket has a total length of 430 to 470mm, a total width of 150 to 185mm, a string unit length of 220 to 225mm, a shaft diameter of 5 to 7mm and a cross section thickness of 0.5 to 1.5mm. The racket of the present invention reduces the flight length and height of the shuttlecock, thereby enabling play within a narrow space. Being lightweight, it is easy for the weak, the elderly and children to use and prevents user joint-strain. Using the racket of the present invention involves more physical exercise, as it demands increased footwork on the part of the user, and increases the activity of the user due to the shuttlecock being passed back and forth more frequently as a result of the shortened flight length. Although the racket of the present invention has a comparatively reduced size, the elastic force of the racket shaft is not reduced, and user joint-strain is therefore prevented by absorption of the force of impact when striking the shuttlecock. Users can execute accurate motions by applying elastic force to the shuttlecock to achieve a satisfactory flight distance. The racket of the present invention is therefore suitable for encouraging national sports participation.

Description

Narrow racket

The present invention relates to a racket that allows playing in a narrow indoor space.

The racket game includes tennis, badminton, squash, and speedminton, and the game using the racket has different specifications such as the size and weight of the racket and the ball (shuttlecock) hit by the racket. have.

Among them, badminton is a game in which the net is centered and the shuttlecock hits the shuttlecock and the net is crossed, and the player who won the rally regardless of sub-score scored 21 points (17 points in elementary school). If the team wins, the team who scores two consecutive points in the 20:20 tie (primary 16:16) wins, and the team who scores 30 points (25 primary) first for 29:29 (elementary school 24:24) wins. do.

Items required to perform such badminton games include rackets, shuttlecocks, nets, etc., and spaces having a constant height and width are required according to the shuttlecock's flight curve.

Looking at the racket of the article, as shown in Figure 1, the handle 2, the string (4), the head 6, the shaft (8), the throat (provided with the string 4) 9), including the handle (2) in the range 200-250mm, the total length should not exceed 680mm, the total width should not exceed 230mm, the string portion (4) should be within 280mm in length, 220mm in width, There is no restriction on weight, shape or material. They are made of solid wood, only shafts are made of steel, and made of pure steel. In recent years, special carbon and fiber materials are used a lot. A string hitting a racket is the most resilient and durable sheep made from a sheep's field, so the athlete usually uses it in competitions. In practice, however, nylon or silk may be used.

In order to add elastic force to the shuttlecock while the impact force applied to the string is attenuated through the shaft at the moment of hitting the shuttlecock in such a racket, the shaft is formed in a tubular shape having a long length and a hollow portion in the center, and as shown in FIG. Is 7-8.5mm and the cross section thickness is 1.5-2.5mm.

As shown in Figs. 3 and 4, the shuttlecock is a bird feather 20 inserted into a base 10 made of a hemispherical cork. The weight is 4.5 to 5.5 g, and the diameter of the cork is 2.5 ~ 2.8cm, the number of feathers should be 16 pieces, the length from the end of the feather to the upper surface of the base should be 6.4 ~ 7.0cm, the diameter of the feather is 58 ~ 68mm, the upper surface and the feather (20) of the base (10) The outer circumference of the ball shall be at an angle of 65 ° to 75 °, with a maximum speed of 320 km / h, with the player falling between 53 and 99 cm inside the opposite back boundary line by an underhand at one end of the court.

In addition, badminton is relatively light and feathers are opened at a certain angle, so the wind is affected by the wind. Therefore, when playing outdoors, the shuttlecock does not fly in the desired direction and distance even when the wind is weak. Problems have arisen, or lose interest in the game. Therefore, the official game is played at the indoor stadium where all outdoor air is blocked. To this end, the ceiling must have a height of at least 9m, the line of the court is 5.18m wide for singles and 6.1m doubles for both. The length of the boundary line is 13.4m, with a net with a center of l.524m and a shore side of l.55m.The single long service line is 6.7m from the net and the double long service line is 5.94m. It must be constructed.

However, the above-described badminton game requires at least 9m of ceiling height of the indoor space. However, since the space having more than 9m is almost none except the indoor stadium, the general public does not receive the wind resistance. It was virtually impossible to perform. In addition, the badminton game can play only up to four players on the court, so there was a problem that the ratio of the number of athletes to space is very low.

Despite the low ratio of the number of athletes to space as described above, the reason for determining a relatively wide and long coat size depends on the structure of the racket and shuttlecock. In other words, it is necessary to secure the flight distance and the flight height by applying the flight path in the case of hitting the correct swing method and the correct angle with a conventional racket and shuttlecock.

Meanwhile, in the conventional shuttlecock, 16 feathers have a standing angle of about 70 ° (the angle between the base and the feather), so in order to have a sufficient flying distance in consideration of air resistance during the flight, it is necessary to maintain accurate steps and body movements during the blow. For example, the angle of smashing is about 60 °, the angle of high clear is about 80 °, and the push is about 70 °. This becomes possible.

However, since the conventional racket has a long length, it is difficult for an ordinary non-professional player to accurately match the shuttlecock with the string part, and thus, the shuttlecock cannot be accurately aligned. Posture was not correct, there was a problem that comes to the joints, etc. after exercise, the pain caused by such a group is known as tennis elbow (medical term is humeral trauma of the humerus (上腕骨外傷顆炎), The cause is a partial rupture of the tendon that wraps the bone from the elbow to the palm of the hand.

The tendon rupture in these tennis elbows is caused by vibrations caused by the ball or shuttlecock hitting the racket that stimulates the arm.If you use too heavy rackets or the grip size does not fit, you can also use strings (horizontally and vertically on the frame of the racket). This may occur even if the strength of the string is not adequate. As described above, the wrong stroke using only the arm without paying attention to the step by focusing only on hitting the ball or shuttlecock with the racket also acts as a main cause.

In addition, since the vibration generated when the shuttlecock fits the racket becomes larger as the weight of the shuttlecock becomes heavier, the case that the lightest shuttlecock is used as much as possible does not overwhelm the joints.

On the other hand, the badminton is subjected to a lot of wind resistance, speedminton grafting badminton and tennis to improve this is spreading, this is using the speed of the badminton shuttlecock made of rubber material instead of cork weight In other words, the speed is improved compared to badminton, so that it receives less wind resistance.

However, the speedminton's speeder is heavier than the shuttlecock, which has a bad effect on the joints and the speed is not suitable for the elderly or the child, and the court size also uses a 5.5m square of 12.8m, which is 23.8m in total. The space is required, there is a problem that can not be played indoors.

Tennis is also heavy, fast, and requires a wide court, making it unsuitable for playing indoors.

In addition, the Republic of Korea Patent Publication No. 10-2004-0025507 discloses a technology that can be played indoors and shortened the dimensions of the racket as compared to the conventional so as not to burden the elderly and children, while using the conventional racket material as it is By simply shortening the length of the racket, there is no description of changing the dimensions of the material such as width or diameter in the detailed description of the specification.

As such, in the case of a racket using the conventional racket material as it is, the diameter is the same, but only the length is shortened so that the elastic force is reduced, so that the impact force generated when the shock with the shuttlecock is transmitted to the user through the handle as it is, and the elastic force in the shaft during the impact Since it does not occur, the shuttle's flight distance depends only on the user's smashing speed, hitting force and tension of the string, and the shaft's tension cannot be expected, and the flight distance is greatly shortened even when hitting with the same force as a conventional racket. There was a problem.

As it does not absorb the shock in this way, there is a problem in joints, there is no tension when hitting the shuttlecock, so the user has to excessively smash the motion, so there is a problem of being easily tired during the game, and the shuttlecock does not generate elastic force in the shaft. Since it hits the racket, it is difficult to accurately play the hairpin, drive, smashing, return, etc., in a narrow space that requires elaboration, and the power of the smashing is caused.

The present invention is designed to improve the structure of the racket to mitigate the impact caused by the impact reduction and the precision of the technical skills, joints, etc. that occur in the racket reduced only the dimensions of the material as used conventionally for the narrow space as described above There is a purpose.

Features of the present invention for achieving the above object, the overall length is 430-470mm, the overall width is 150-185mm, the length of the string portion has a standard 200-225mm, the diameter of the shaft is 5-7mm, the shaft cross section thickness It is on a racket with 0.5-1.5 mm.

The racket weighs 50-70 g.

In addition, the handle is formed as short as possible, the length is in the range of 90-160mm.

According to the present invention configured as described above, since the overall weight of the racket is lighter than in the related art, the user can easily enjoy the game even when the shuttlecock is not hit by the user without difficulty.

In addition, since the diameter and the cross-sectional thickness of the shaft are also reduced while the diameter and the overall length are greatly reduced as compared to the conventional racket, the shaft has elasticity similar to that of the conventional racket, so even when the racket is reduced, the vibration generated during the impact is absorbed from the shaft. Therefore, there is an effect that the disease caused by the vibration generated by the strike, such as tennis elbow is reduced.

In addition, because the elastic force is added to the shuttlecock during the strike, the shuttlecock is loaded with force, so that the flight distance is improved compared to the racket made with only a shorter length, so that excessive movement is not required, such as smashing, and accurate play is possible. , The game becomes fun.

In addition, since the overall length of the racket is shortened to fit the shuttlecock compared to the conventional long racket, there is an effect that can cause interest in the game.

In addition, since the racket is configured to be short, the ceiling height, which was required for more than 9 m, is lowered to about 3 m-4 m, so that the game can be enjoyed with shuttlecocks and rackets anywhere in the room.

In addition, because the racket is shortened, it is easy to fit the shuttlecock, so that you can not only simply match the shuttlecock with the racket, but also pay attention to the correct arm or foot movements. Thus, the exercise effect is improved.

As the length of the racket is shortened, the impact force applied when the shuttlecock is hit is reduced, and thus the damage rate of the shuttlecock is significantly reduced compared to the conventional racket, and the shuttlecock is disposed of at the time of breakage, but according to the racket of the present invention, the disposal rate of the shuttlecock is greatly reduced. Not only is there a resource saving effect, but it also significantly reduces the cost of purchasing shuttlecocks.

1 is a view showing a conventional racket

2 is a cross-sectional view of a conventional shaft

3 is a perspective view of a conventional shuttlecock

4 is a side cross-sectional view of a conventional shuttlecock

5 is a view showing a racket according to the present invention

6 is a cross-sectional view of the shaft according to the present invention

7 shows the structure of a shuttlecock

8 is a diagram showing the standard of the net

9 is a diagram showing a standard of a coat

10 is a view showing the trajectory of the shuttlecock when using a racket article of the present invention and a conventional racket article

* Description of the symbols for the main parts of the drawings *

110: string portion 120: handle

210: base 220: feather

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 5 is a view showing a racket according to the present invention, Figure 6 is a cross-sectional view of the racket according to the present invention, Figure 7 is a view showing the structure of a shuttlecock suitable for use when using the racket of the present invention, Figure 8 9 is a view showing the standard of the net, Figure 9 is a view showing the standard of the coat, Figure 10 is a view showing the rule of the shuttlecock when using a racket article of the present invention and a conventional racket article.

The badminton article according to the present invention is largely composed of a racket, a shuttlecock and a net.

In the above racket, as shown in Figure 5, the general badminton racket does not have a weight regulation, but the present invention has a weight range of 50g-70g in order to avoid much distance of the shuttlecock, the total length 430-470mm, the overall width is 150- 185mm, the length of the string portion 110 is 200-225mm, the dimensions of the handle 120, the shaft 130 and the throat 140 is adjusted in the total range of 230mm-255mm.

As shown in FIG. 6, the shaft 130 has a diameter of 5-7 mm and a cross-sectional thickness of 0.5-1.5 mm.

In addition, the handle 120 has a length of 90-160mm, which is intended to minimize the size of the handle while preventing the inconvenience when holding the handle.

And, the interval of the string is to be a square with one side is 0.6-1.2cm, which is to be described later as the shuttlecock narrower as the size is reduced so that the shuttlecock is not caught between the strings at the time of hitting.

As shown in FIG. 7, the optimal shuttlecock structure for allowing a game to be played in a narrow indoor space with the racket has a diameter of the cork material base 210 having a diameter of 17-22mm and 10-14 pieces. The base 210 is inserted into the upper surface at regular intervals, the vertical length from the upper surface of the base 210 to the end of the feather 220 is 65-73mm, the standing between the upper surface of the base 210 and the feather 220 The angle should be 60 ° -70 ° and the total weight should be 2.1g-2.6g.

On the other hand, the shuttlecock configured as described above should be landed between 5 m and 7.1 m from the hitting position when hit by the full stroke of the under hand.

As shown in Fig. 8, the net is composed of a central height of 1.45m, a support side height of 1.47m, and a width of 4.3m, and the mesh of the net is formed to have a square of 1-1.8cm on one side.

As shown in Fig. 9, the court has a length of 8.6m and a width of 4.3m, with a short service line of 1.33m, a double long service line of 3.88m from the net, and a single long service line of 4.3m from the net. The width of the coat is used as a double sideline and the single sideline is positioned at a position 0.42 m inward from the coat width, respectively.

According to the racket configured as described above, as the length of the racket becomes shorter and the hitting position of the racket and shuttlecock is closer to the body, it is easier to align the shuttlecock with the racket, and the flying position of the shuttlecock is lowered because the hitting position is lower.

In addition, the shuttlecock suitable for the racket of the present invention, the size of the base is greatly reduced and the number of feathers is reduced overall size and the weight is significantly reduced compared to the conventional, and the standing angle of the feather is narrow compared to the conventional air during driving It is subjected to a lot of resistance, the flight height is lowered and the flight distance is shorter than the conventional.

Looking at such a mileage and height with reference to Figure 10, the dotted line of Figure 10 shows the flight trajectories when using the conventional badminton racket and shuttlecock in the long high service, the solid line in the long high service using the racket and shuttlecock of the present invention By showing the flight trajectory of the shuttlecock, it can be seen that the flight trajectory of the present invention is lower and shorter than in the prior art.

Accordingly, when using the racket of the present invention and a suitable shuttlecock, the flight height of the shuttlecock is lowered and the flight distance is shortened, so that it is possible to exercise indoors, and it is possible to play in an indoor of 3-4m height.

Claims

In the racket comprising a string portion, a handle, a shaft,

The racket has a total length of 430-470 mm, a total width of 150-185 mm, a length of the string portion 200-225 mm, a shaft diameter of 5-7 mm, and a shaft cross section thickness of 0.5-1.5 mm. racket.
The racket of claim 1, wherein the racket has a weight in the range of 50g-70g.
The racket of claim 1, wherein the handle is 90-160 mm long.