RU2823762C1 - Tennis training simulator - Google Patents

Abstract

FIELD: sport.

SUBSTANCE: invention relates to teaching the technique of playing tennis, in particular, for children of 6–10 years old and beginning to study adults. Disclosed is a simulator for training in the game of tennis, which includes a cantilever rod, to the end of which a flexible cable with a ball at the end is attached, wherein, according to the invention, the cantilever rod, on the side opposite to the attachment of the flexible cable, is connected to a base rod of the supporting structure equipped at least at the ends, made with possibility of detachable engagement with enclosure, ball is made of elastic material and has diameter in range of 10–30 cm with weight of 60–150 grams, and the flexible cable is connected to the cantilever rod by means of a wheel installed on the cantilever rod with possibility of rotation around it. Invention makes it possible to: – significantly reduce time of training to hit the ball, as well as to all basic techniques as whole in 1.5–2 times; – to increase the force of blows due to the ball meeting in front of the body, mastering the perfect rhythm of movements, greater amplitude of the swing and explosive extension of the hand with the racket into the ball; – to work out the technique of all basic techniques, promptly making adjustments in the movement details during the training; develop dexterity, quickly maneuvering with feet and reflecting a ball flying up along different trajectories; – develop speed and pace of the game by adjusting the length of the flexible ball thread and the frequency of strikes; – to develop coordination of movements, using blows over the head, different types of blows at the level of belt in combination with variety of movements and approaches to the ball; – to develop speed endurance and functional training of students by increasing the pace of the game and the duration of the series of strikes, taking into account their individual capabilities; at the same time loads can reach their maximum values (by pulse meter 150–160 beats per minute).

EFFECT: taking into account mobility, simplicity and high efficiency of the proposed device for training to play tennis (simulator), training of tennis can become available and widespread both in children's schools and throughout the country—in training groups and in amateur sections, on an individual basis at the place of residence and at dachas, which will significantly increase the mass character of tennis as a sport, a means of promoting health and entertainment—in full compliance with the modern needs of our community and the social policy of the state; simulator can be used throughout, including on all tennis courses, because 95% of them are surrounded by either a soft net on closed courses, or a rigid net on the street in the open air.

7 cl, 22 dwg

Description

The present invention relates to the field of sports, namely to teaching tennis playing techniques, in particular to children aged 6-10 years and beginner adults.

At the first stage of training, the curriculum provides for the mandatory use of a suspended ball - as an important methodological tool for practicing the point of impact on the ball and setting the technique for performing basic strikes in simplified conditions.

A training device for playing tennis is known, which includes a cantilever rod, to the end of which a flexible cable with a ball on the end is attached (1). In tennis practice, it is called a "fishing rod".

The console rod is held by either a trainer, an assistant, or another student, or it is permanently attached to a fixed support, such as a wall or a fence of a hall, to a judge's tower, to rigid supporting structures of a metal fence, in particular, a tennis court or a sports hall. A person learning to play tennis (a student) hits a ball hanging on a flexible thread on the console rod with a racket. In the well-known trainer, this is a standard tennis ball.

The said well-known trainer is currently used to practice the technique of performing basic strokes on a tennis ball, as well as the force of the stroke.

This technical device is accepted as the closest analogue.

The main disadvantage of the well-known simulator is its low efficiency for the training process, which is expressed in the following.

On the one hand, the known technical solution uses a standard tennis ball.

Note: The International Tennis Federation (ITF) defines the official diameter of a tennis ball as 6.54 - 6.86 cm (2.57 - 2.70 in). The weight of a tennis ball must be between 56.0 - 59.4 g (1.98 - 2.10 oz). This is what is meant by a standard tennis ball.

Since a standard tennis ball has a small diameter, tennis racket strikes result in high ball speeds, at which, as practice has shown, it is impossible to qualitatively practice the technique and force of the strike. On the other hand, a tennis ball has a high density and with a strong strike there is a large recoil, which can lead to injury of the wrist joint.

Thus, it is impossible to effectively develop “striking skills” and increase the force of strikes on existing devices.

At the same time, due to the high speeds and small size of a standard tennis ball, working on technique is also ineffective: it is difficult to stop the training process and adjust movements during the execution of a series of strikes on the ball.

However, the student (athlete) needs to practice basic technical techniques outside the court, since in the game he has to subordinate all his activities to winning a point in different and difficult conditions.

In addition, the above-mentioned practice of strikes in known devices, except for the “fishing rod”, is complicated due to the labor intensity and inconvenience of assembling and disassembling the structure of the simulator at the beginning and end of the training process, in particular, on the court fence, on the judge’s tower, etc.

When a student (athlete) works on the court, it is difficult to correct technical deficiencies.

With a fast flight of the ball on the well-known simulator, it is also difficult to keep everything under control and it is difficult to practice the full arsenal of technical techniques, including strikes on the move with an approach to the ball and exit from the strike.

It should be added that permanent installation of exercise equipment is usually limited or impossible, since training sessions are often conducted on a temporary rental basis, subject to regulatory restrictions imposed by the administration of the sports facility.

As numerous studies have shown, for effective training it is necessary to combine the following elements in an interrelated manner:

• an elastic ball of increased diameter, having a weight approximately equal to the weight of a standard tennis ball;

• fastening the ball on a flexible thread by means of a wheel on a supporting structure with the possibility of hooking onto a fence to quickly change the position in space of the supporting structure, and consequently, the corresponding position of the ball in space.

Increasing the diameter of the ball while maintaining its weight reduces the speed of the incoming ball, which stimulates an increase in the force of the strike on it - the main indicator of playing skill along with the technique of performing the technique.

Attaching such a ball to a thread with adjustable length on a support structure that can be easily adjusted in height allows you to dramatically increase the effectiveness of training and use the full arsenal of techniques at different heights of the support structure several times during training.

At the same time, we note the disadvantages of the known device:

• Difficulty of training, since it is not possible to create special, facilitated conditions for mastering the basic elements of technical techniques: point of impact, orientation of the racket, ball tracking, correct rhythm of movements, simple hitting of the ball;

• the need to involve additional assistants to hold the cantilever rod (“fishing rod”) with a standard tennis ball;

• the unpredictability of the flight path of a standard tennis ball, which makes it difficult to hit it with a racket;

• inconvenience of using the simulator, caused by the complexity, labor intensity and duration of installation and changing the position of the supporting structure, and, consequently, the tennis ball in space;

• fatigue of the person holding the cantilever rod (“fishing rod”) in his hands or difficulty in adjusting the height of the supporting structure.

The technical objectives of the declared simulator are:

1. Significant facilitation of learning to play tennis and increased effectiveness of training for the student (athlete) as a result of creating special simplified conditions for mastering the basic elements of technical techniques: point of impact, orientation of the racket, ball accompaniment, correct rhythm of movements, facilitation of hitting the ball, and simultaneously with the possibility of quickly rearranging the ball-supporting trainer for learning to play tennis in height to master the full arsenal of technical techniques;

2. Stimulating the development of punching power, forming active play skills at an early age, which ultimately allows for a modern, fast-paced attacking game.

Let's look at this in more detail.

As noted earlier, tennis training is currently started at 5-10 years of age. At this age, due to insufficient muscle strength, it is difficult to begin training using standard and special lightweight tennis balls for training, since the child still has insufficient coordination of movements, insufficient reaction, etc. For this reason, it is necessary to have feasible, accessible means of initial training for training, which allow developing specific tennis hitting skills (forehand, backhand, serve, smash (hitting the ball during the game, when the opponent throws up a "candle", and the player on top "kills" it) and confident hits on a moving ball.

1. The possibility of independent long-term training work of the student without the involvement of assistants;

2. Providing conditions for a predictable flight of the ball and ease of hitting it, which facilitates and shortens the process of repeatedly performing full strokes;

3. increasing the efficiency of the training process and achieving higher training results, thanks to the high density of training and a wide variety of techniques;

4. expansion of the range of devices for this purpose.

Thus, in accordance with the set objectives, the technical results achieved by the declared simulator are:

1. Significant simplification of learning to play tennis as a result of creating special facilitated conditions for mastering the basic elements of technical techniques: point of impact, orientation of the racket, ball tracking, correct rhythm of movements, easier hitting of the ball;

2. stimulating the advanced development of the power of strikes, the formation of active play skills at an early age, which ultimately allows for a modern, fast-paced attacking game;

3. the ability of a student (athlete) to conduct active, independent, targeted and long-term training work without outside help or the involvement of assistants;

4. creating conditions for a predictable flight of the ball at low speed and confident hits on it, which accelerates the improvement of skill through the execution of a series of technically complete and varied strikes;

5. increasing the efficiency of the training process and achieving higher training results;

6. expansion of the range of devices for this purpose.

The stated task and the specified technical result are achieved by the claimed trainer for teaching how to play tennis, including a cantilever rod, to the end of which a flexible cable with a ball on the end is attached, wherein, according to the invention, the cantilever rod, on the side opposite to the fastening of the flexible cable, is connected to a base rod of a supporting structure equipped with gripping means at least at the ends, made with the possibility of detachable engagement with a fence, the ball is made of an elastic material and has a diameter in the range of 10-30 cm with a weight of 60-150 grams, and the flexible cable is connected to the cantilever rod by means of a wheel mounted on the cantilever rod with the possibility of rotation around it.

This set of common essential features represents the essence of the claimed invention. It is necessary and sufficient in all cases of its implementation.

This technical solution has the following advantages compared to the prototype:

1. improvement (simplification) of teaching how to play tennis as a result of creating special facilitated conditions for mastering the basic elements of technical techniques: point of impact, orientation of the racket, ball tracking, correct rhythm of movements, confident hits on the ball;

2. Stimulating the advanced development of the power of strikes, the formation of active play skills at an early age, which ultimately allows for a modern, fast-paced attacking game;

3. Provides the opportunity for the student (athlete) to carry out active, independent, long-term training work without outside help or the involvement of assistants;

4. Creates conditions for a predictable flight of the ball at low speed and confident hits, which accelerates the improvement of skill due to the execution of confident, serial, technically complete hits;

5. increases the efficiency of the training process and allows achieving higher training results in the main parameters;

6. expands the range of devices for this purpose.

At this point in the description, the applicant considers it necessary to once again draw attention to the following.

For effective training, the tennis training simulator must have the following features (characteristics):

• the presence of an elastic ball of increased diameter, having a weight approximately equal to the weight of a standard tennis ball,

• fastening the ball on a flexible thread on a cantilever rod with the ability to rotate around it;

• fastening the ball to a supporting structure with the ability to easily move it along the surface of the fence in height.

Increasing the diameter of the ball while maintaining its weight reduces the speed of the incoming ball, which stimulates an increase in the force of the strike on the ball - the main indicator of the quality of a tennis reception along with technical execution.

Attaching such a ball to a thread with adjustable length on a support structure that can be easily adjusted in height allows you to dramatically increase the effectiveness of training and practice all sets of tennis techniques at different heights of the support structure during training. It takes a few seconds to manually rehang the support structure, changing the position of the ball in height, which is very convenient and increases the effectiveness of the training.

The declared trainer for teaching tennis (trainer) allows the trainer to practice the student's techniques, promptly intervening in the process of performing the exercise with or without stopping the moving ball - after one, two, three beats (a beat is one complete swing of the pendulum - which in this case is a swinging ball on a flexible thread), which significantly increases the effectiveness of training.

We use different techniques and different strikes on a ball hanging at different corresponding heights.

It should be noted that the claimed device has different aerodynamics of the ball's movement in space compared to the known technical solution:

1. It is much easier for a training person, an athlete, to hit the ball because it is larger in diameter than a standard tennis ball.

2. The ball, according to the claimed invention, is more elastic, soft, not as dense as a standard tennis ball, and therefore there is cushioning (there is no hard hit with the racket on the ball, but there is a smooth cushioning of the ball with a smooth low force, i.e. there is no high recoil and no high load on the wrist and arm)

3. Because the ball is large and light, it slows down quickly and comes back slower than a standard tennis ball.

4. It is important to note that the weight of the ball, according to the invention, is equal to or close to the weight of a standard tennis ball.

It is these features, together with the ease of moving the ball in height on the supporting structure, that are necessary for the effective development of both a wide range of technical techniques and the force of the blow.

The claimed device ensures the formation of confident striking skills in early childhood, which by the age of 12-13 are fully realized on tennis courts in a real game, and teenagers display a modern active style of play at a high tempo. In other words, there is an accelerated development of strong attacking strikes at a high tempo, which provide players with advantages over their opponents in competitions.

The declared trainer for teaching tennis is especially useful for training girls aged 5-7 who do not have the skills of throwing and, accordingly, overhead strikes - serves and smashes. In childhood, unlike boys, they usually do not throw stones, cones and, as a result, do not know how to hit with a racket from above. The suspended ball plays a strong and positive role here in the targeted development of coordination of movements and the formation of overhead strikes, serves and smashes.

It should be noted that it is very important for girls to learn how to master high-point shots and overhead shots (serve and smash) at every training session in the simplest conditions. It is especially valuable that this lays the foundation for good serves. In tennis , the serve accounts for 50% of the win. It is not for nothing that tennis players usually win games on their serve. If you lose your serve, the athlete can lose the set and most likely the match. The declared device allows you to practice any shots at every training session due to a quick change in the height of the ball as a result of rearranging the supporting device in height and due to the reduced speed of the ball.

The applicant considers it necessary to once again dwell on the following feature of the claimed invention.

As noted earlier, it consists in the fact that the weight of the ball used, with an increased diameter, is approximately equal to the weight of a tennis ball of 58 - 60 grams.

As noted earlier, the International Tennis Federation (ITF) defines the official diameter of a tennis ball as 6.54 - 6.86 cm (2.57 - 2.70 in). The weight of a tennis ball must be in the range of 56.0 - 59.4 g (1.98 - 2.10 oz).

In the claimed invention, due to the increased diameter of the ball while maintaining the standard weight of the ball established by the International Tennis Federation, the efficiency of practicing strokes is increased, consisting in the fact that,

• firstly, with the increased diameter it is easy to hit the ball with the racket, which makes learning much easier,

• secondly, the ball slows down quickly and is easy to hit, which stimulates stronger strikes and the formation of an attacking style of play,

• thirdly, learning becomes easy with good dynamics of acceleration of the racket movement into the ball,

• fourthly, the strikes are made without misses and it is possible to select a mode that is suitable specifically for a given student. For example, not to strike every returning ball, but after 1-2-3 cycles of the pendulum movement of the ball on a flexible thread.

As a result, striking skills are formed early in childhood, and strong strikes and an active style of play are practiced.

At the same time, a rhythm is actively formed, a clear approach to the ball and accelerated acceleration of the racket.

On the court in game conditions it is impossible to achieve maximum flight speeds of a tennis ball due to the huge variability and unpredictability of its flight trajectories, different speeds and spatial characteristics, and on the declared trainer for training in tennis it is possible to successfully form striking skills on the ball from early childhood. As they grow up, students master ball handling and good technique on the court, which allows them to use active attacking strikes and the most modern power style of play by the age of 12-13.

As noted earlier, the stated device is convenient for working on technique. At any time, you can stop the exercise, adjust the athlete's movements and the trajectory along which the ball moves by hanging the device in height. At the same time, you can develop coordination of movements and practice movements, the force of the blow and set the technique in simple game situations.

The claimed device allows training both from a place and with different approaches to the ball, in motion, using the method from simple to complex, that is, first "from a place", and then "in motion". The figures, starting with Fig. 11, show some diagrams of the technical arsenal of a tennis player used on the claimed device, namely,

Fig. 11 illustrates: Right and left strikes in a closed stance (at different heights: high at the level of the head and shoulders, medium - at the level of the waist and hip, and low - at the level of the knee and below), approaches to the ball can be different, as well as exits from the strike;

Fig. 12 illustrates: Smash and serve;

Fig. 13 illustrates: Right and left strikes on the move;

Fig. 14 illustrates: Right and left strikes in an open stance;

Fig. 15 illustrates: Attacking Left Punches in Closed Stance;

Fig. 16 illustrates: Attacking Right Punches in Closed Stance;

Fig. 17 illustrates: Right and left volley strikes;

Fig. 18 illustrates: Serial strikes in pairs with a change of position;

Fig. 19 illustrates: Serial strikes with a run in a pair.

This is an incomplete list of the technical arsenal of basic techniques that can be used during training on the declared device.

As can be seen from the brief list above, on the declared trainer for teaching tennis, you can practice all the techniques under the supervision of a trainer. You can work from a place, or on the move, change approaches to the ball and perform various combinations of the athlete's approach with blows. As noted above, to do this, the declared trainer for teaching tennis allows you to easily and simply change the position of the ball in space by height and the length of the string of the suspended ball.

The stated device can be used for training both individually and in a small group. In this case, the process becomes more dynamic, interesting and fun.

For example, these techniques can be practiced both at a low point and at a high point, which is easily achieved by simply rearranging the height of the supporting structure, designed to be hooked onto the fence.

You can lengthen the flexible thread or hit the ball every 1-2 cycles and then the ball moves longer and not only one athlete can train, but 2-4 in turn.

The declared device for training in tennis can also be used to practice different types of strokes and at different heights:

• sliced,

• twisted,

• flat,

• on a rebound ball,

• since summer,

• at a high point.

All this is ensured only by the combination of common essential features of the first independent claim of the invention.

In addition, with regard to the claimed device, it is necessary to highlight the following developments and/or clarifications of the totality of its general essential features, relating to particular cases of use of the invention.

The supporting structure, designed with the possibility of detachable engagement with the fence, may have various structural designs. For example, its base rod may be connected on the side opposite the ball plumb line to a traction rod connected at its other end to the fence (Fig. 22).

However, this design is not convenient, as it requires, for example, a stepladder to adjust the height.

According to the applicant, the most preferable technical solution is one in which the supporting structure, designed with the possibility of detachable engagement with the fence and containing a base rod equipped with gripping means at least at the ends, is characterized by the fact that a cantilever rod and an additional rod located transversely to the base rod in the same plane as it, transverse to the cantilever rod, are transversely connected to it in the central part, wherein the other end of the additional rod is equipped with a means for fixing to the fence (Fig. 1 - Fig. 21).

This design of the supporting structure, made with the possibility of detachable engagement with the fence, allows you to easily rearrange it in height on the fence and there is no need to look for a stepladder, ladder, stool, chair for this. It is simple in design, technological, has a small weight, can be easily made from auxiliary material (plastic, wood, metal, etc.).

In addition, it is reliable in operation, practical, allows for easy assembly and disassembly, and takes up little space during transportation, as it can be folded.

As noted above, the ball can be made of elastic material and have a diameter in the range of 10-30 cm and a weight of 60-150 grams, however, in the opinion of the applicant, the greatest effect from training occurs when the ball has a diameter in the range of 10-18 cm and a weight of 60-80 grams. The ball can be inflatable, plastic or light rubber. The wheel on the cantilever rod can also have a different design.

However, the applicant considers the most preferable variant when the wheel is a ball bearing, the inner ring of which is fixedly connected to the cantilever rod, and the flexible cable is attached to the outer rotating ring. In this case, the unit is simple in design and has high reliability.

The gripping means of the supporting structure can have different designs. For example, it can be hooks that grip the net thread. This is the simplest and most convenient device for hanging and moving along the height when necessary.

The claimed device can be fixed to various fences.

If the fence is a rigid mesh, it is desirable that the means for fixing to the fence be a carabiner.

If the fence is a flexible mesh, it is preferable that the means for fixing to the fence be a crossbar connected to the end of the additional rod with a crossbar at the opposite end.

The declared supporting structure with the possibility of hooking onto the fence can be made as a collapsible structure with collapsible joints.

• Base rod with cantilever rod,

• an additional rod with a base rod and a means for fixing to the fence,

• moreover, it is additionally equipped with a means for optimal load distribution in the form of a rod, one end of which is pivotally fixed to an additional rod, and the other end is removably fixed to a cantilever rod,

• and, in addition, is equipped with an elastic band for fixing the disassembled supporting structure, designed with the possibility of hooking onto the fence.

The declared supporting structure with the possibility of hooking onto the fence may have other designs. For example, it may be made of plastic, knocked down from wood, made of metal rods with welded joints. If it is made of wooden elements (rods), then the connection of the console and additional rods may be reinforced with a welded metal corner.

In conclusion of this section of the description, it should be noted that in addition to the advantages noted above, the advantage of the present invention also lies in the fact that the device can be manufactured on technological equipment already used in industry.

The invention also makes it possible to expand the range of training equipment.

Numerous other modifications of the declared device are possible.

The invention is illustrated by a drawing.

Fig. 1 shows a trainer for learning to play tennis in assembled form, axonometry;

Fig. 2 - the same, side view, axonometry;

Fig. 3 - the same, front view, axonometry;

Fig. 4 shows a trainer for teaching tennis in assembled form, temporarily fixed to a flexible net fencing a tennis court, axonometric view;

Fig. 5 shows a carbine, axonometry;

Fig. 6 shows the claimed trainer for teaching tennis in disassembled form (with parts spaced apart from each other), axonometry;

Fig. 7 shows the claimed device disassembled for transportation, the parts of which are secured with an elastic band, axonometry;

Fig. 8 shows a threaded connection, longitudinal section;

Fig. 9 shows a ball bearing, partial cutout, axonometric view;

Fig. 10 shows a separate part of the cantilever rod, on which a flexible cable with a ball at the end is attached, axonometry;

Fig. 11 schematically illustrates an example of using the claimed invention for teaching tennis techniques: Right and left hand strikes in a closed stance;

In Fig. 12 - the same for teaching the technique: Smash and serve;

Fig. 13 - the same for teaching the technique: Right and left strikes on the move;

In Fig. 14 - the same for teaching the technique: Right and left strikes in an open stance;

In Fig. 15 - the same for teaching the technique: Attacking Left Punches in a Closed Stance;

In Fig. 16 - the same for teaching the technique: Attacking Punches on the Right in a Closed Stance;

Fig. 17 - the same for teaching the technique: Right and left volley strikes;

In Fig. 18 - the same for teaching the technique: Series of blows in pairs with a change of position;

Fig. 19 illustrates: Serial strikes with a run in a pair;

Fig. 20 shows the claimed device in the upper position;

Fig. 21 shows the claimed device in the lower position;

Fig. 22 shows a modification of the claimed invention;

The trainer 1 for teaching tennis includes a cantilever rod 2, for example, in the form of a light plastic pipe, to the end 3 of which a flexible cable 4 with a ball 5 at the end is attached, wherein the cantilever rod 2, on the side opposite to the fastening of the flexible cable 4, is connected to a supporting structure 6, made with the possibility of detachable engagement with a fence 7. In this case, the ball 5 is made of an elastic material and has a diameter in the range of 10-30 cm with a weight of 60-150 grams, and the flexible cable 4 is connected to the cantilever rod 2 by means of a wheel 8, mounted on the cantilever rod 2 with the possibility of rotation around it.

The supporting structure 6, designed with the possibility of detachable engagement with the fence, comprises a base rod 10, equipped at least at the ends with gripping means 9, for example in the form of a light plastic pipe, to which a cantilever rod 2, for example in the form of a light plastic pipe, and an additional rod 11, for example in the form of a light plastic pipe, located transversely to the base rod 10 in the same plane with it, transverse to the cantilever rod 2, are transversely attached in the central part. The other end of the additional rod 11 is provided with a means 12 for fixing on the fence.

The most optimal for training is for the ball 5 to have a diameter in the range of 10-18 cm and a weight of 60-80 grams.

Wheel 8 may have a different design, for example, it may be a ball bearing 13, the inner ring of which is fixedly connected to cantilever rod 2, and flexible cable 4 is attached to outer rotating ring 14.

Each gripping means 9 is a hook 15 welded or glued to the base rod, at least at its ends.

The fence 7 may be a flexible mesh 16, and the means 12 for fixing on the fence in this case may be a transverse rod 17 connected to the end of the additional rod 11 with a transverse bar 18 at the opposite end (Fig. 4), which lies on the flexible mesh 16. The presence of such a design of the means 12 for fixing on the fence with the transverse rod 17 and the transverse bar 18 is due to the fact that the flexible mesh 16 bends and the cantilever rod 2 tilts. In order to prevent the cantilever rod 2 from tilting so that it takes a position close to horizontal, the means for fixing on the fence contains the transverse rod 17. In this case, the transverse bar 18 rests on the flexible mesh 16 without special fastening to it, for example, with a carabiner.

The fence may also be a rigid mesh. In this case, the cantilever rod occupies an approximately horizontal position. For this reason, it is desirable that the means for fixing on the fence be a snap hook 19 (Fig. 5), which directly connects the end 20 of the additional rod 11 to the rigid mesh.

Note: If the fencing is a rigid mesh, the means for fixing to the fencing contains only a carabiner, and the crossbar and crossbar are missing.

The snap hook 19 comprises a hook 21 and a spring portion 22 opening inwards. To connect with the fingers, the spring portion 22 of the snap hook is bent inwards and the hook 21 grasps the end 20 of the additional rod 11 and the nearest rod of the rigid net, which are inside the snap hook. After this, the spring portion 22 of the snap hook is released and it returns to its normal position, characterized by contact with the hook 21, fixing the end 20 of the additional rod 11 and the nearest rod of the rigid net inside the snap hook. The design with the rigid net is obvious and for this reason is not shown in the figure.

The supporting structure 6, designed with the possibility of detachable engagement with the fence, can be designed in different ways.

In particular, it can be made as a prefabricated and disassembled structure with prefabricated and disassembled joints.

In this case, the device has the following three prefabricated and disassemblable joints:

• prefabricated joint 23 of base rod 10 with cantilever rod 2,

• prefabricated joint 24 of the base rod 10 with the additional rod 11 and

• prefabricated and disassemblable joint 25 of additional rod 11 with transverse rod 17 of means 12 for fixing on the fence.

All three prefabricated joints have the same design.

Let us consider it using the example of a prefabricated joint 23 of the base rod 10 with the cantilever rod 2 (Fig. 8).

The cantilever rod 2, as noted above, is made in the form of a pipe, inside which from the end there is an internal screw thread 26. The base rod 10 has a connecting element 27 rigidly connected to it in the form of an L-shaped curved pipe, on the end part of which an external screw thread 28 is made on the outside. For connection, the cantilever rod 2 is first applied with its end to the end of the connecting element 27 and by rotation the internal screw thread 26 is screwed onto the external screw thread 28.

The applicant considers it necessary to note that there are various possible options for the design by means of which the external screw thread 28 will be made on the base rod 10, onto which the internal screw thread 26 is screwed. For example, the external screw thread 28 may not be made on the connecting element 27 of an L-shaped form in the form of a curved pipe, but may be made on the outside on a straight rod welded to the central part of the base element 10.

Other modifications are also possible. This is especially convenient when manufacturing lightweight parts from thermoplastic plastics using their thermal molding method.

For optimal load distribution, the collapsible supporting structure 6 with collapsible joints, designed with the possibility of detachable engagement with the fence, can be additionally provided with a means for optimal load distribution in the form of a rod 29, one end 30 of which is pivotally fixed on an additional rod 11, and the other end 31 is fixed on the cantilever rod 2 removably, for example, by means of a loop 32 welded to the cantilever rod. There is a hole 33 in the loop, and a hole 34 on the rod 29. To connect, holes 33 and 34 are aligned, an axle with a screw thread at the ends is threaded through them. After the axle is threaded, nuts are screwed onto its ends to prevent the axle from falling out.

In addition, the collapsible supporting structure 6 with collapsible joints is provided with an elastic cord 35 for fixing the supporting structure 6 in a disassembled form, made with the possibility of hooking onto the fence. After wrapping the parts of the disassembled supporting structure 6 with the elastic cord 35, its ends can be tied to individual parts. For convenience, the ends of the elastic cord 35 can be provided with carabiners 19, by means of which the ends of the elastic cord 35 are fixed on the parts of the disassembled supporting structure 6.

The supporting structure 6, made with the possibility of detachable engagement with the fence, can be made non-detachable from wood, plastic, metals with welded joints. When making the supporting structure from wood, the connection of the cantilever rod 2 and the additional rod 11 can be reinforced with a welded metal corner.

The connection of the ball with the flexible cable can be performed in different ways. For example, the ball 5 is placed in the net 36 made of nylon, to which the flexible cable 4 is connected, in particular, by means of the carabiner 19, or the flexible thread 4 is simply tied to the net 36 (Fig. 10).

To connect the flexible thread 4 to the ball bearing 13, a loop 37 can be welded to its outer rotating ring 14, to which the flexible thread 4 is tied.

The declared device is easy and simple to install within 4-5 minutes on a soft fencing net - in the hall or on a rigid metal mesh - "chain-link" - outdoors.

The suspended ball 5 on a flexible cable 4 (for example, synthetic) is attached to the wheel 8, which with each blow freely rotates around the cantilever rod 2, which can be a metal, wooden or plastic tube 0.6-0.8 m long. If the wheel 8 is a ball bearing 13, then its inner ring 38 is rigidly connected to the cantilever rod 2.

A ball weighing 60-150 g of increased size - the diameter has a range of 10-30 cm allows students to achieve confident hits on it with a racket, both due to the larger volume of the ball, and due to the rapid deceleration of its flight speed during energetic strikes, and the height of the ball suspension is quickly and easily adjusted by rearranging the device in height depending on the type of technique being practiced (serve, smash, forehand and backhand strikes, etc.) and the height of the tennis player, as well as by changing the length of both the flexible cable 4 and the height of the support structure 6 on the fence. The total weight of the simulator is 2.5 - 3.0 kg - depending on the material used (plastic, wood), in the camp form - this is a bundle of rods fastened with an elastic cord 35.

Fig. 11 - Fig. 19 show examples of the use of the claimed invention for practicing individual tennis techniques. In these examples, the students are designated by position 39, and the racket in their hands by position 40.

Fig. 22 shows a modification of the claimed technical solution. According to it, the supporting structure, made with the possibility of detachable engagement with the fence 7 in the form of a flexible net 16, has the following feature: its base rod 10 is connected on the side opposite the plumb line of the ball 5, with a rod 41, connected at the other end to the fence 7, for example, with a carabiner 19 (Fig. 22).

However, this design, although covered by the stated formula of the invention, is less convenient, since it requires, for example, a stepladder for rearranging the height.

A more convenient design is shown in Fig. 20 (in the upper position) and the same in Fig. 21 (in the lower position), which was discussed in detail in the main part of the description (Fig. 1 - Fig. 21).

The invention allows:

- significantly reduce the time required to learn how to hit the ball, as well as all the basic technical techniques in general, by 1.5 - 2 times;

- increase the power of your strikes by meeting the ball in front of your body, mastering the perfect rhythm of your movements, greater swing amplitude and explosive movement of your hand with the racket into the ball;

- practice the technique of all the basic techniques, promptly making adjustments to the details of the movements during the training;

- develop agility by quickly maneuvering your legs and deflecting the ball flying at you along different trajectories;

- develop the speed and pace of the game by adjusting the height of the device, the length of the flexible string of the ball and the frequency of the blows;

- develop coordination of movements using overhead strikes, different types of waist-level strikes in combination with a variety of movements and approaches to the ball;

- to develop speed endurance and functional training of students by increasing the pace of the game and the duration of a series of strikes, taking into account their individual capabilities; in this case, the loads can reach their maximum values (according to the heart rate monitor, 150 - 160 beats per minute).

Considering the mobility, simplicity and high efficiency of the declared trainer for teaching tennis, tennis training can become accessible and widespread both in children's schools and everywhere - in clubs, in study groups and in amateur sections, on an individual basis at the place of residence and in summer cottages, which will significantly increase the popularity of tennis as a sport, a means of strengthening health and entertaining leisure - in full accordance with the modern demands of our society and the social policy of the state.

The trainer can be used anywhere, including all tennis courts, because 95% of them are surrounded by either a soft net on indoor courts or a hard net on the open air.

Sources of information taken into account when preparing the application:

1. https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.expert-sports.com%2Ftrenirovochnoe_oborudovanie%2Ftennisnie_trenajery%2Fdlya_usileniya_udarov%2F&psig=AOvVaw1i_U12LDSDqSXGtzchTqGd&ust=1696331997645000&source=images&cd=vfe&opi=89978449&ved=0CA8QjRxqFwoTCKDi9Kyf14EDFQAAAAAdAAAAABBY , 02.10.2023 (closest analogue).

Claims (7)

1. A training device for playing tennis, comprising a cantilever rod, to the end of which a flexible cable with a ball on the end is attached, characterized in that it comprises a supporting structure made in the form of a base rod, which is equipped, at least at the ends, with gripping means made with the possibility of detachable engagement with a fence, wherein a cantilever rod is transversely attached to the base rod in the central part with the side opposite to the fastening of the flexible cable, and the flexible cable is connected to the cantilever rod by means of a wheel, which is a ball bearing, the inner ring of which is fixedly connected to the cantilever rod, and the flexible cable is attached to the outer rotating ring with the possibility of rotation around the cantilever rod, in addition, the ball is made of an elastic material and has a diameter in the range of 10-30 cm with a weight of 60-150 grams. 2. The exercise machine according to item 1, characterized in that an additional rod is additionally attached transversely to the base rod of the supporting structure in the central part, located transversely to the base rod in the same plane as it, transverse to the cantilever rod, and the other end of the additional rod is provided with a means for fixing to the fence. 3. The exercise machine according to item 1, characterized in that each gripping means is a hook. 4. The exercise machine according to item 2, characterized in that the end of the additional rod is additionally provided with a means designed with the possibility of fixation on a flexible net, which is a transverse rod with a transverse bar at the opposite end. 5. The exercise machine according to item 2, characterized in that the end of the additional rod is additionally provided with a means designed with the possibility of fixation on a rigid net, which is a carabiner. 6. The exercise machine according to item 1, characterized in that the supporting structure, made with the possibility of detachable engagement with the fence, is collapsible with collapsible joints of the base rod with the cantilever rod, the additional rod with the base rod and with a means for fixing on the fence, and it is additionally provided with a means for optimal load distribution in the form of a rod, one end of which is pivotally fixed on the additional rod, and the other end is detachably fixed on the cantilever rod, and, in addition, is provided with an elastic band for fixing the supporting structure in a disassembled form, made with the possibility of hooking on the fence. 7. The exercise machine according to item 1, characterized in that the supporting structure, designed with the possibility of detachable engagement with the fence, is non-detachable.