WO2022045598A1

WO2022045598A1 - Tennis ball practice device

Info

Publication number: WO2022045598A1
Application number: PCT/KR2021/009695
Authority: WO
Inventors: 전시병
Original assignee: 전시병
Priority date: 2020-08-28
Filing date: 2021-07-27
Publication date: 2022-03-03

Abstract

The present invention relates to a tennis ball practice device enabling a user to repeatedly practice striking a tennis ball. By the tennis ball practice device according to the present invention, an adjustment point can be set on the left side and the right side of a desired place to limit a fixing point moving along a string. Therefore, when a struck ball returns due to a repulsive force after dragging the fixing point toward the direction in which the struck ball moves, the struck ball rebounds at the fixing point having slid between the adjustment points and then returns near a user. The tennis ball practice device has an O-ring, an 8-shaped ring, and a rotating pulley connected thereto so that there is almost no twisting of the string, includes a storage container (a ball cup) and is thus easily stored and carried therein so that the tennis ball practice device can be easily and frequently held by or removed from the storage container, and enables a user to pleasantly practice striking a tennis ball even in a small space.

Description

tennis ball practice

The present invention relates to a tennis ball practicer for repeatedly practicing hitting a tennis ball.

The present invention relates to a tennis ball exercise machine, and more particularly, to a tennis ball exercise machine used to repeatedly practice hitting a tennis ball by hitting a tennis ball connected to an elastic line fixed to the floor, the purpose of which is easy to use and easy to use , It is convenient to learn the movement of a tennis ball or to exercise continuously, it is simple to mount and remove, and it is also easy to store and move the tennis ball practicer, which is necessary for users who practice hitting a tennis ball.

The string of the existing tennis ball practicer is easily twisted due to the rotation of the ball, the place where the line is fixed and the place where the ball bounces overlap, and the bounce and return of the ball returning after hitting are different, so its use and There are difficulties due to many restrictions in the mounting method. It is also difficult to store and manage balls and strings. In particular, there is a demand for a simple tennis ball practice device that can practice hitting the ball in a narrow space and can be easily mounted or removed from time to time.

The present invention has been devised to solve the problems of the prior art as described above, and the endothelium in the epidermis of a tennis ball is tied with a low-stretch elastic line, and an O-ring, a figure 8 ring, a rotational arrival, 8 Connect the figure-shaped ring and O-ring sequentially, then connect one end of the high-stretch elastic cord, connect the other end of the high-stretch elastic cord to the O-ring, the figure-eight ring, the rotational arrival, and the O-ring sequentially, and at the last O-ring Connect the low-stretch elastic line, then connect the other end of the low-stretch elastic line to the O-ring, and pass the low-stretch elastic line provided with pins for fixing to the floor at both ends in the ring of this O-ring, In the elastic cord, an adjustment mechanism to limit the movement distance to the left and right of the O-ring is configured on the left and right sides, respectively, and a storage container (ball cup) is additionally configured for easy storage and movement It aims to provide a ball practice device.

The tennis ball exercise machine according to the present invention can limit the fixed point moving along the line by setting the control point on the left and the control point on the right where necessary, so that the hit ball drags the fixed point to the moving side and returns to the repulsive force. In case of time, it rebounds at the fixed point that slides between the control points and returns close to the user. O-ring, figure 8 ring, and rotating avil are connected, so there is almost no twisting of the string. Because it is easy to move, it can be easily mounted or removed from time to time, and you can practice hitting a tennis ball with pleasure even in a narrow space.

1 schematically shows the configuration of a tennis ball exercise machine according to the present invention.

Figure 2 schematically shows a configuration in which the tennis ball and the low-stretch elastic line of the tennis ball practicer according to the present invention are connected.

Figure 3 schematically shows the state before and after hitting the tennis ball practicer according to the present invention, (a) shows a state before hitting, (b) shows a state after hitting.

Figure 4 schematically shows a storage barrel (ball cup) that facilitates storage and movement of the tennis ball exercise machine according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Here, detailed descriptions of well-known functions and configurations that may obscure the gist of the present invention will be omitted. For the same reason, some components are exaggerated, omitted, or schematically illustrated in the accompanying drawings.

In addition, the contents described through the embodiments described below are only one embodiment for carrying out the present invention, and are not limited to the contents of the embodiments described below, and the terms or words used in the present specification and claims are It should not be construed as being limited to a conventional or dictionary meaning, but should be interpreted as meaning and concept consistent with the technical spirit of the present invention.

1 and 2, the tennis ball practicer 100 according to the present invention includes a tennis ball 1 capable of hitting; First O-ring A(11-1), first figure-eight ring A(12-1), first rotary aer 13, first figure-eight ring B(12-2) and first o-ring B (11-2) and the first fastening portion 10 is formed by being sequentially fastened; a first low elastic elastic line (LEL1) connecting one end of the tennis ball (1) and the first O-ring A (11-1) of the first fastening part (10); A second fastening part 20 formed by sequentially fastening the second O-ring A (21-1), the second figure-eight ring 22, the second rotating aero 23 and the second O-ring B (21-2). )Wow; a high elastic elastic line (HEL) connecting the first O-ring B 11-1 of the first fastening part 10 and the second O-ring A 21-1 of the second fastening part 20; The third O-ring 31, the first pin 32-1 and the second pin 32-2, the first adjustment mechanism 33-1 and the second adjustment mechanism 33-2, and the third low elastic elasticity a third fastening part 30 made of a string (LEL3); It is composed of a second low elastic elastic line (LEL2) connecting the second O-ring B 21 - 2 of the second fastening part 20 and the third O-ring 31 of the third fastening part 30 .

The first fastening part 10 is connected by inserting the upper ring of the first figure 8-shaped ring A (12-1) into the ring of the first O-ring A (11-1), and connecting the first figure-eight ring. The ring of one end of the first rotary shaft 13 is inserted and connected to the lower ring of A (12-1), and the first figure 8-shaped ring B ( The upper ring of 12-2) is inserted and connected, and the first O-ring B(11-2) is inserted and connected to the lower ring of the first figure 8-shaped ring B(12-2).

The second fastening part 20 is connected by inserting the upper ring of the second figure-eight ring 22 into the ring of the second O-ring A (21-1), and the second figure-eight ring 22 is connected. The ring of one end of the second rotary shaft 23 is inserted and connected to the lower ring of is connected, and a second O-ring B (21-2) is inserted and connected to the lower ring of the second figure-eight ring (22).

The third fastening part 30 passes into the ring and is provided movably to the left and right along the third low elastic elastic line (LEL3) and a third O-ring 31 and a third low elastic elastic wire (LEL3). Left and right movement of the first pin 32-1 and the second pin 32-2 that can be fixed to the floor at both ends of the third O-ring 31 in the third low elastic elastic line LEL3 A first adjustment mechanism 33-1 and a second adjustment mechanism 33-2 capable of limiting the distance are configured to be movable.

The tennis ball (1) is connected to the endothelium (1-2) in the epidermis (1-1) of the tennis ball (1) tied to the first low elastic elastic line (LEL1).

The first low-stretch elastic line LEL1 connecting one end of the tennis ball 1 and the first fastening part 10, the second O-ring B 21-2 and the third fastening part of the second fastening part 20 A second low-stretch elastic line (LEL2) connecting the third O-ring (31) of (30) and a first pin (32-1) and a second pin (32-2) that can be fixed to the floor are connected at both ends The material of the third low elastic elastic line (LEL3) is generally a slightly stiff, light, smooth and low elastic elastic line with low elasticity that can prevent tangling and tying like a fishing line, but is not limited thereto It doesn't matter as long as it's a low-strength elastic cord.

The material of the highly elastic elastic cord (HEL) connecting the first O-ring B 11-1 of the first coupling part 10 and the second O-ring A 21-1 of the second coupling part 20 is light and smooth. One high elasticity high elastic elastic cord is used, but it is not limited thereto, and it does not matter if it is a light, smooth elastic high elastic elastic cord.

It is sufficient that the first rotary guide 13 and the second rotary guide 23 have no effect on the other side even if one side rotates.

The first pin 32-1 and the second pin 32-2 that can be fixed to the floor at both ends of the third low-stretch elastic cord LEL3 use pins or screws, but are not limited thereto. Other types of means for securing may be used.

The first adjustment mechanism 33-1 and the second adjustment mechanism 33-2 that can limit the left and right movement distances of the third O-ring 31 in the third low-stretch elastic line (LEL3) are the third A stop rubber such as a rubber material capable of restraining movement is used in the low elastic elastic line LEL3, but is not limited thereto, and other types of means capable of restraining the movement of the third O-ring 31 may be used.

When the tennis ball (1) is hit and the first low elastic elastic line (LEL1) rotates due to the rotation of the tennis ball (1), the first rotational arrival (13) rotates and twists the first low elastic elastic wire (LEL1) It can be prevented, and all elastic lines (the first low elasticity elastic line (LEL1), the second low elasticity elastic line (LEL2), the third low elasticity elastic line (LEL1) and When the high elastic elastic cord (HEL)) is pulled, all the rings (O-rings and figure 8 rings) are connected to each other in contact with each other, and when they are released, they can be free from each other in all rings, so that all the elasticity caused by the rotation of the tennis ball (1) The line may be less affected.

As shown in Figure 3, the first pin (32-1) located at both ends of the third low-stretch elastic line (LEL3) passed into the ring of the third O-ring (31) when the tennis ball practicer 100 is mounted. The first adjustment point ( RP1) is formed, and the second adjustment point RP2 is formed by moving and adjusting the second adjustment mechanism 33-2, and the initial position of the third O-ring 31, that is, the third low elastic elastic line LEL3 ), a fixed point FP is formed in the approximately middle portion.

If it is difficult to fix the first pin (32-1) or the second pin (32-2) located at both ends of the third low-stretch elastic line (LEL3) to the floor when mounting the tennis ball practice device (100), separately It can also be fixed by fixing both ends of the low-stretch elastic cord (not shown) to the floor where it is easy to fix, and fastening the first pin 32-1 or the second pin 32-2 in the middle of the low-stretch elastic cord. .

When hitting the tennis ball 1 from the center to the left, the third O-ring 31 moves to the left along the third low-stretch elastic line LEL3 at the position point before hitting, and at the first control point RP1 on the left. It is stopped, and the tennis ball 1 repulsed from the stop is always returned to the user toward the stop. In addition, when hitting the tennis ball 1 from the center to the right, the third O-ring 31 moves to the right along the third low-stretch elastic line LEL3 at the point before the hitting, and the second adjustment point RP1 on the right side is stopped, and the tennis ball (1) repulsed at the stop is always returned to the user toward the stop.

When hitting the ball, the third O-ring 31, the first adjustment point (RP1) and the second adjustment mechanism where the first adjustment mechanism (33-1) in the third low-stretch elastic line (LEL3) located before the impact is located (33-2) is moved in the range between the second adjustment point (RP2), and after the third O-ring (31) moves, the tennis ball (1) repulses and returns, so that the hit tennis ball (1) is It always returns to the side closer to the user, and by hitting the returned tennis ball 1 again, it is possible to practice the exercise in continuous motion repeatedly.

4, one side is open and a part of the body 41 is cut in a triangular shape from the lower side to the upper side, it has a neck 43 and a spiral mouth 42 and a spiral lid 44, The spiral lid 44 further includes a storage barrel (ball cup) 40 provided with a string ring 45 to be hung on a racket or bag, and a tennis ball 1 is put in the body 41, and the neck (43) and the body 41, the first fastening portion 10, the first low elastic elastic cord (LEL1), the second fastening portion 20, the high elastic elastic cord (HEL), the third fastening portion (LEL3) ) and the second low-stretch elastic cord (LEL2) is wound, and the first pin (32-1) and the second pin (32-2) of the third fastening part (30) are put into the spiral inlet (42), and the lid (44) ) to close it to facilitate storage and movement.

Although the detailed configuration of the tennis ball exercise machine 100 according to the present invention has been described, the present invention is not limited to the above-described embodiments or the accompanying drawings, and design needs and It goes without saying that various modifications, changes in size and function, combination and substitution, etc. are possible depending on various other factors.

[Explanation of code]

100: tennis ball practice

1: Tennis Ball

1-1: epidermis 1-2: endothelium

10: first fastening part

11-1: First O-ring A 11-2: First O-ring B

12-1: first figure-eight ring A 12-2: first figure-eight ring B

13: first rotation arrives

20: second fastening part

21-1: 2nd O-ring A 21-2: 2nd O-ring B

22: second figure 8 ring

23: second rotation arrives

30: third fastening part

31: third O-ring FP: fixed point

32-1: first pin 32-2: second pin

33-1: first adjustment mechanism RP1: first adjustment point

33-2: second adjustment mechanism RP2: second adjustment point

40: storage barrel (ball cup)

41: body 42: entrance

43: neck 44: lid

45: string ring

LEL1: the first low-stretch elastic cord

LEL2: the second low-stretch elastic cord

LEL3: 3rd low elastic elastic cord

HEL: high elasticity elastic cord

Claims

tennis ball,

a first fastening part comprising the first O-ring A, the first figure-eight ring A, the first rotary abutting, the first figure-eight ring B, and the first O-ring B;

A first low-stretch elastic line connecting one end of the tennis ball and the first O-ring A of the first fastening part;

a second fastening part comprising a second O-ring A, a second figure-eight ring, a second rotating abutment, and a second O-ring B;

A highly elastic elastic line connecting the first O-ring B of the first coupling part and the second O-ring A of the second coupling part;

A third fastening part comprising a third O-ring, a first pin and a second pin, a first adjustment mechanism, a second adjustment mechanism, and a third low-stretch elastic cord;

It consists of a second low-stretch elastic line connecting the second O-ring B of the second fastening part and the third O-ring of the third fastening part,

The first fastening part is connected by inserting the upper ring of the first figure-eight ring A into the ring of the first O-ring A, and the ring at one end of the first rotational arrival to the lower ring of the first figure-eight ring A is inserted and connected, the upper ring of the first figure-eight ring B is inserted and connected to the ring at the other end of the first rotational arrival, and the first O-ring B is inserted into the lower ring of the first figure-eight ring B It is inserted and connected and composed,

The second fastening part is connected by inserting the upper ring of the second figure-eight ring into the ring of the second O-ring A, and inserting the ring at one end of the second rotating arrival into the lower ring of the second figure-eight ring. The upper ring of the second figure-eight ring is inserted and connected to the ring of the other end of the second rotating abutment, and the second O-ring B is inserted and connected to the lower ring of the second figure-eight ring, is composed,

The third fastening portion passes into the ring, and a third O-ring that is provided to be movably left and right along the third low-stretch elastic line, and a first pin that can be fixed to the floor at both ends of the third low-elastic elastic line and The second pin and the third low-stretch elastic line in the third O-ring left and right movement distances that can limit the first adjustment mechanism and the second adjustment mechanism are configured to be movable,

When hitting the ball, the third O-ring moves between the first adjustment point where the first adjustment mechanism is located and the second adjustment point where the second adjustment mechanism is located in the third low-stretch elastic cord, and then returns, so that the hit ball is always Tennis ball practicer, characterized in that returning closer to the user.
The method of claim 1,

Storage bin (ball cup) with one side open and a part of the body cut in a triangular shape from bottom to top, with a neck and a spiral mouth and a spiral lid, and a spiral lid with a string hook for hanging on a racket or bag. It further includes

Put a tennis ball in the body, and wind the first fastening part, the first low elastic elastic cord, the second fastening part, the high elastic elastic cord, the third fastening part and the second low elastic elastic cord around the neck and the body part, and the third fastening part Tennis ball exercise machine that inserts a first pin and a second pin into a spiral opening and turns the lid to facilitate storage and transport.
According to claim 1,

A tennis ball is a tennis ball practice device in which the first low-stretch elastic cord is tied and connected to the endothelium in the epidermis of the tennis ball.