KR200359004Y1 - A tennis racket including double main strings - Google Patents

Abstract

The present invention relates to a tennis racket consisting of two strings,

The head portion 700, the shaft portion 800 extending from the head portion 700, the grip portion 900 formed at the end of the shaft portion 800, and the plurality of horizontal lines 100 in the head portion 700. In the tennis racket is composed of a structure consisting of interwoven with the vertical line (200), because the vertical line 200 passing through the sweet spot 300 is characterized by consisting of two lines,

Compared to a single racket, the durability is greatly improved, and the service life is at least twice as long.

Description

Tennis racket including two vertical strings {A TENNIS RACKET INCLUDING DOUBLE MAIN STRINGS}

The present invention relates to a tennis racket including a double vertical string, and more particularly, to a tennis racket that greatly extends its life by not being easily broken by friction between each other when the string moves due to vibration or friction during hitting.

As shown in FIGS. 1 and 2, the tennis racket includes a head portion 700, a shaft portion 800 extending from the head portion 700, and a grip portion 900 formed at the end of the shaft portion 800. And, the plurality of horizontal lines 100 and the vertical line 200 in the head portion 700 is made of a configuration woven while crossing. This structure is similarly applied to badminton rackets and squash rackets.

Tennis racket strings are required to have good elasticity, durability, feel, shock absorption, and control. Among them, durability is one of the most important elements that a tennis racket should have as a property that a string is not easily broken. By the way, when using a general tennis racket, you can see a lot of cases that the string is easily broken because it does not use for a long time. The mechanism of disconnection as described above will be described in more detail as follows.

As shown in FIG. 1, the sweet spot 300, which is the central portion of the racket, is the portion having the greatest elasticity, in which the batting must be made to send the ball in the desired position and direction, and the racket The vibration of the body can be prevented from being unreasonable. If you hit the ball out of the sweet spot, the arm will be strained by the vibration and the desired speed or rotation will not be achieved. Accordingly, the person who practiced tennis or played an actual game consciously tries to hit the ball in the sweet spot 300, and actually hits the most hitting the ball.

By the way, since the tennis racket has a configuration in which the horizontal line 100 and the vertical line 200 are woven together, the horizontal line 100 and the vertical line 200 were often deviated from their original positions by the force of the ball during actual hitting. . In particular, in the case of applying a technique such as a drive or a slice, the vertical line 200 has slipped with respect to the horizontal line 100 in many cases to be out of the original position. This is a phenomenon that is easily observed in the form of players frequently touching their rackets after performing services or strokes during tennis games.

As the frequency of sliding the vertical string 200 with respect to the horizontal string 100 in this manner is increased, as shown in Figure 3, the vertical string 200 is locally damaged and eventually disconnected. In particular, since the hitting of the ball is most frequently made in the above-described sweet spot 300, the damage of the vertical string 200 passing through this portion is most frequent.

In fact, if you use a tennis racket on the market for two to three hours every day practice practice, the line was broken once every 13 days.

In order to prevent this, conventionally, the tennis racket string may be made of a high quality durable material, but this has the disadvantage of increasing the price of the product, and durability was not very satisfactory.

The present invention has been made to solve the above problems, an object of the present invention is to provide a tennis racket including a double vertical string that can increase the durability and extend the life without changing the material of the rope constituting the tennis racket. .

1 is a front view showing the structure of a conventional tennis racket.

Fig. 2 is a diagram showing a row arrangement structure of a conventional tennis racket, (a) is a front view, (b) is a side sectional view, and (c) is a flat sectional view.

3 is a front view showing a state in which strings are scattered in a conventional tennis racket.

4 is a front view showing the structure of the tennis racket according to the present invention.

5 is a view showing the arrangement structure of the tennis racket according to the present invention, (a) is a front view, (b) is a side cross-sectional view, (c) is a flat cross-sectional view.

6 is a perspective view showing the structure of the bumper according to the present invention, wherein (a) to (d) each show another embodiment of the perforated tube.

Figure 7 is a perspective view showing the structure of the bumper according to the present invention, showing an embodiment of the support member portion.

8 is a perspective view showing the structure of the bumper according to the present invention, showing an example in which the support member and the perforated tube are separated.

※ Explanation of Major Drawings

100 ... cross string

200 ... main string

300 ... sweet spot

400 ... bumper

410 ... support member

411 ... Home

412 ... separation jaw

420 ... sky hole

421. Guide hole

700 head

800. Shaft

900 ... grip

In order to achieve the above object, the tennis racket comprising a double vertical string according to the present invention,

A tennis racket comprising a head portion, a shaft portion extending from the head portion, a grip portion formed at an end of the shaft portion, and a configuration in which a plurality of horizontal and vertical strings are interwoven in the head portion.

The vertical line is characterized by consisting of two lines.

And, it is preferable that the vertical line passing through the sweet spot is composed of two lines.

The diameters of the two vertical lines may be formed differently.

On the other hand, the head portion is provided with a bumper, the bumper may be composed of a support member and a plurality of perforated pipes installed to extend from the support member.

At this time, it is preferable that the perforated tube is formed with a guide hole in which each string is inserted separately.

The guide hole may be formed in an eight-shaped communication.

Instead, the guide hole may be formed of two circular holes.

In addition, the support member, it is preferable that the separation step is formed along the longitudinal direction between the width of the guide groove so that the two strings are separated and guided.

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

4 shows a structure of a tennis racket according to the present invention, and FIG. 5 shows a row arrangement of the tennis racket according to the present invention.

And, Figure 6 shows the structure of the perforated tube as the structure of the bumper according to the present invention, Figure 7 shows the structure of the support member of the bumper.

As shown, the tennis racket of this embodiment includes a head portion 700, a shaft portion 800 extending from the head portion 700, a grip portion 900 formed at the end of the shaft portion 800, A plurality of horizontal lines 100 and vertical lines 200 intersect in the head portion 700 and are woven together. This configuration is similar to the prior art.

On the other hand, in the tennis racket in this embodiment, the vertical line 200 is composed of two lines. In particular, the vertical line 200 passing through the sweet spot 300 is composed of two lines and the rest is composed of one line.

The diameters of the two strings may be the same or different. In addition, the material may also be adopted differently.

By such a structure, the cross-sectional structure of the vertical string 200 as shown in FIG. 5 is obtained.

Specifically, when two vertical lines 200 are formed in one portion, two vertical lines 200 are in contact with one horizontal line 100, and the two vertical lines 200 abut and rub against each other. Therefore, the contact point is increased by that much, and eventually the vertical line 200 movement resistance against the horizontal line 100 is increased.

In addition, the interval between the vertical line 200 and the other vertical line 200 neighboring becomes narrow, so that the angle of inclination (α ', FIG. 5) of the horizontal line 100 becomes larger than the conventional (α, FIG. 2). As a result, the vertical movement of the vertical line is significantly reduced and durability is increased.

As a result of experiments using a tennis racket according to the present invention employing a general tennis racquet employing one row and two vertical rows in a sweet spot, the lifespan of the tennis racquet of the present invention was found to be about three times longer.

On the other hand, the tennis racket according to the present invention, the bumper 400 is provided on the head portion 700. If the head 700 is made of wood and the interior is filled, the bumper 400 is not necessary, but in the case where advanced materials such as Kevlar, boron, ceramic, and high modulus are applied, the head 700 is hollow. Because it is formed, it is necessary to interpose the bumper 400 in the middle because a lot of cases are easily broken due to damage to the sharp edge portion when the string passes. The bumper 400 includes a support member 410 and a plurality of perforated pipes 420 extending from the support member 410.

However, according to the present embodiment, some vertical lines are composed of two strings, and the head part 700 needs to be provided with a bumper 400 through which the two strings pass.

In the bumper 400 through which two strings pass, when the perforated pipe 420 is formed by one guide hole 421, as shown in Figs. 6A and 6B, an ellipse or one side What is necessary is just to form this narrow oval shape.

However, in the case where the guide holes 421 are separately formed so that the respective strings are inserted separately, as shown in FIGS. 6C and 6D, the guide holes 421 are formed in communication with each other. It can be formed by two circular holes provided separately. With such a configuration, it is possible to prevent the two strings from twisting each other halfway.

In addition, the support member 410 of the bumper 400, in which a plurality of perforated pipes 420 are installed, has an arc shape to fit the outer contour of the head portion 700, and a line is formed on the surface thereof. There is a guide groove 411 that rides along the circumferential direction when configuring. However, when the vertical line 200 is composed of two lines according to the present embodiment and is inserted together in the guide groove 411, two strings may be twisted or rubbed together in the guide groove 411. have. Therefore, the support member 410, the separation jaw 412 is formed along the longitudinal direction between the width of the guide groove 411 so that two strings are separated and guided.

In addition, as shown in FIG. 8, when the attachment and detachment of the perforated pipe 420 is removed from the support member 410 in the bumper 400 to be detachably free, only the perforated pipe 420 is replaced with only two vertical lines 200. ) Can be applied.

According to the present invention of the configuration as described above, the vertical line in the sweet spot portion of the tennis racket is composed of two, there is an advantage that the durability is greatly improved and the life is at least twice as long as compared to the racket composed of one row.

In addition, the perforated pipe and the support member of the bumper are formed so that the two strings are guided separately, so that the case of being twisted or rubbed with each other in the middle can be avoided, thereby maintaining durability.

Claims (8)

The head portion 700, the shaft portion 800 extending from the head portion 700, the grip portion 900 formed at the end of the shaft portion 800, and the plurality of horizontal lines 100 in the head portion 700. In the tennis racket that is composed of interwoven woven line and vertical line (200), The vertical line 200 is a tennis racket, characterized in that consisting of two lines. The method of claim 1, The vertical line 200 passing through the sweet spot 300 is a tennis racket, characterized in that consisting of two lines. The method of claim 2, Tennis racket, characterized in that the diameter of the two vertical lines 200 are different from each other. The method according to claim 2 or 3, A bumper 400 is installed at a portion corresponding to the sweet spot 300 of the head 700, The bumper 400 is a tennis racket, characterized in that consisting of a support member 410, a plurality of perforated pipes (420) installed to extend from the support member (410). The method of claim 4, wherein The drill pipe 420 is a tennis racket, characterized in that the guide hole 421 is formed that each row is inserted separately. The method of claim 5, The guide hole 421 is a tennis racket, characterized in that formed in communication with the eight-shaped. The method of claim 5, The guide hole 421 is a tennis racket, characterized in that formed by two circular holes. The method of claim 4, wherein The support member 410 is a tennis racket, characterized in that the separation jaw 412 is formed along the length direction between the width of the guide groove 411 so that two strings are separated and guided.