DE202020106845U1 - tennis training device - Google Patents

Abstract

Tennis training device (1), characterized in that the tennis training device (1) has a rod (2) and a ball (3) which is rotatably arranged around the rod (2).

Description

The present invention relates to a tennis training device for training racket-ball coordination, in particular for practicing and preparing spin strokes such as forward spins, sideways spins or backward spins.

Tennis trainers are known which are designed for practicing tennis shots. These include basic units placed on the floor, which are connected to a tennis ball with a rubber band. Training units of this type require a large amount of space and are also unsuitable for special training of spin strokes.

Another form of tennis trainer is whip-like with a flexible handle and a terminal weight. This device is used to train the serve.

Based on the aforementioned training devices for self-training, the subject matter of the present application deals with the problem of practicing spin strokes, for example for self-training or for warming up before a game.

The present invention solves the aforementioned problem with a tennis training device with the features of claim 1.

A tennis training device according to the invention comprises a rod and a ball, preferably arranged concentrically to the rod and rotatable about its longitudinal axis.

Advantageous configurations of the invention are the subject matter of the dependent claims.

It can advantageously be mounted using a receiving sleeve, in particular made of POM and/or PVC.

The ball is arranged in a linearly limited manner along the rod. Stop elements are provided to limit mobility.

An advantageous embodiment of the rod is a glass fiber rod or glass fiber rod. This has sufficient flexibility on the one hand and stability and mechanical behavior that comes particularly close to the game situation of a ball hit.

The design of the receiving sleeve and/or the stop elements made of plastic, in particular made of POM and/or PVC, minimizes friction and enables a particularly optimal rotation.

The geometric dimensions of the training device were further optimized with numerous tests and a lot of experience about the optimal spin behavior.

Particular importance was also attached to measures that prevent damage to the mostly expensive tennis rackets, especially since the training device can also be used excellently in professional sports, in which very expensive, individually tailored rackets are used.

• 1 Perspektivansicht einer bevorzugten Ausführungsvariante eines erfindungsgemäßen Tennistrainingsgeräts;
• 2 Schnittansicht des Tennistrainingsgeräts der 1;
• 3 Vorderansicht auf das Tennistrainingsgerät;
• 4 Schnittansicht auf eine Aufnahmehülse;
• 5 Vorderansicht auf die Aufnahmehülse;
• 6 teilgeschnittene Seitenansicht auf eine Anschlagscheibe; und
• 7 Vorderansicht der Anschlagscheibe.

Further advantages, features and details of the invention result from the following description, in which an exemplary embodiment of the invention is explained in more detail with reference to the accompanying drawing. The person skilled in the art will expediently also consider the features disclosed in combination in the drawing, the description and the claims individually and combine them into further meaningful combinations. Show it:

• 1 Perspective view of a preferred embodiment of a tennis training device according to the invention;
• 2 Sectional view of the tennis training device 1 ;
• 3 Front view of the tennis training device;
• 4 Sectional view of a receiving sleeve;
• 5 Front view of the receiving sleeve;
• 6 partially sectioned side view of a stop disk; and
• 7 Front view of the stop disc.

1 , 2 and 3 show a variant of a training device 1 according to the invention comprising a rod 2 with a longitudinal axis 11, preferably a glass fiber rod, also called glass fiber rod, on which a ball 3 with a receiving sleeve 4 is attached and fixed to this. The receiving sleeve 4 is shown in detail in 4 and 5 pictured. It is rotatable and linearly displaceable on the rod 2.

The ball 3 can preferably be designed as a tennis ball in order to simulate the playing conditions and the rotation and spin behavior as authentically as possible.

The receiving sleeve 4 can be made from plastic, in particular from polyoxymethylene and/or from PVC, preferably from a polymer mixture, e.g. as a copolymer.

The receiving sleeve 4 enables optimal rotation of the tennis ball. In the longitudinal direction of the fiberglass rod 2, a defined movement of the tennis ball is limited by two stop elements, preferably stop disks 5, 6, which are shown in detail in 6 and 7 are shown.

Analogous to the receiving sleeve 4, these can be made of polyoxymethylene and/or PVC, preferably made of a polymer mixture, e.g. as a copolymer.

The fiberglass rod 2 has a grip area 7 which is covered with a rubber coating 8, preferably a colored rubber coating. This leads to a good grip and a better feel.

To prevent damage and injuries, the stop disks and/or the stop sleeve have one and/or more rounded or chamfered peripheral edges 10, in particular on the outer circumference.

Preferred dimensions of the tennis training device are described in more detail below,

The length dimensions preferably relate to a tennis ball with a typical diameter of 66 mm.

The overall length of the training device 1 can preferably be 9-12 times the diameter of the ball 3 .

The rod 2 has a preferred diameter of 10-22%, preferably 14-19%, of the diameter of the ball 3.

The rod 2 is preferably formed from a solid material, preferably from an extruded solid material.

The distance between the stop surfaces of the two stop elements 5 and 6 is preferably 112-135%, particularly preferably 115-125% of the diameter of the ball 3.

The strength of the stop elements 5 and 6 in the longitudinal direction of the rod 2 is preferably 8-15%, preferably 10-14% of the diameter of the ball 3.

The length of the receiving sleeve 4 is preferably 101-109%, preferably 104-108% of the diameter of the ball 3.

The radial play of the receiving sleeve 4 relative to the rod 1 is preferably less than 5 mm, preferably between 0.05 and 0.35 mm, particularly preferably between 0.1 and 0.25 mm. The radial clearance corresponds to the difference between the inner diameter of the receiving sleeve 4 and the outer diameter of the rod 2 divided by two.

The outer diameter of the annular stop surface 9 of the receiving sleeve 4 is preferably less than 50% of the diameter of the ball 3, preferably 25-30% of the diameter of the ball 3.

The polymer and/or rubber sheathing 8 has a thickness of between 0.2 and 1.5 mm. The material can be shrink tubing.

The tennis training device 1 is compact and light in length, it is similar to a tennis racket, so that it can easily be carried in any backpack or tennis bag. The tennis training device 1 can be used completely independent of location and time and in particular for individual training without teammates.

The tennis training device 1 is used due to the ball 3 being arranged rotatably around the fiberglass rod in order to be able to train and improve the various types of spin.

For this purpose, the tennis training device 1 is held in one's own hand and the ball 3 is set in the desired rotation depending on the type of impact.

By independently observing the desired rotation, the practitioner receives immediate feedback on his stroke technique. Most of the kinetic energy that occurs when the ball 3 is hit is converted into rotation of the ball 3 . As a result, the wrist of the hand with which the tennis training device 1 is held is particularly easy on.

An example of using the tennis training device 1 is a forehand topspin shot. If you hit the ball 3 diagonally from bottom to top with the tennis racket, then the ball 3 spins forward (topspin). If you hit the tennis ball 3 with the tennis racket from top to bottom, then the ball 3 rotates backwards (slice).

The training device can be used as follows. The user holds the tennis racket with the forehand grip in his batting hand. In the other hand he holds the tennis training device 1 right in front of the body at pocket height (forehand topspin shot) and hits with the ten racquet from bottom to top against the ball 3. This creates the so-called topspin (forward spin), the ball 3 is thus set in forward rotation around its own axis.

Other variations of the workout include back twist (slice). Here the practitioner holds the tennis racket with the hitting hand and with a so-called hammer grip. In the same way as you would hold a hammer in your hand. The left hand also holds the fiberglass rod 2 on the right in front of the body, only this time at the height of the chest and then hits the ball 3 with the tennis racket 1 diagonally from top to bottom so that a backwards rotation can occur.

In order to train the slice serve, the glass fiber rod 2 is held vertically and to the right in front of the body with the left hand. Then you hit the side of the ball 3 with the hitting hand and also with the hammer handle, which then rotates sideways around its own axis and around the fiberglass rod 2 .

All shots, except the slice serve, can also be practiced with a partner holding the stick.

The tennis training device 1 is ideal for warming up before a competition, even for professionals. Since the wrist, the ligaments, tendons and muscles involved in the stroke can be optimally and tennis-specifically prepared for the immediate competition movement sequences within a very short time.

With the tennis training device, a large number of strokes can be performed in a row within a short period of time without having to collect balls

The tennis training device impresses with its simple design, the small number of components and the exclusive use of plastic parts. The tennis stroke technique is additionally improved by the tennis training device.

Tennis-specific techniques and twist types can be practiced in the smallest of spaces.

Damage to the tennis racket is avoided through the use of plastic parts and the additional rubber coating in the grip area.

A use according to the invention comprises learning spin shots by using the training device 1, with the ball 3 being set into a predetermined rotational movement by a tennis racket.

Reference List

1

tennis training device

2

Rod

3

ball

4

receiving sleeve

5

stop element

6

stop element

7

grip area

8th

Polymer and/or rubber coating

9

stop surface

10

edge

11

longitudinal axis

Claims (20)

Tennis training device (1) , characterized in that the tennis training device (1) has a rod (2) and a ball (3) which is rotatably arranged around the rod (2). tennis training device claim 1 , characterized in that the rod (2) has a longitudinal axis (11) and that the ball (3) has a central channel through which the rod (3) passes, the channel being coaxial with the longitudinal axis (11). tennis training device claim 1 or 2 , characterized in that the rod (2) is formed from a solid material, preferably from a fiber-reinforced material. Tennis training device according to one of the preceding claims, characterized in that the rod (2) is designed as a glass fiber rod. Tennis training device according to one of the preceding claims, characterized in that the ball (3) is designed as a tennis ball. Tennis training device according to one of the preceding claims, characterized in that the overall length of the training device (1) is preferably 9-12 times the diameter of the ball (3). Tennis training device according to one of the preceding claims, characterized in that the rod (2) has a diameter of 10-22%, preferably 14-19%, based on the diameter of the ball (3). Tennis training device according to one of the preceding claims, characterized in that that the ball (3) is arranged linearly movable within a defined section along the rod (2). tennis training device claim 8 , characterized in that the section is delimited by two stop elements (5, 6) for limiting the linear mobility of the ball (3). Tennis training device according to any one of the preceding claims, characterized in that the central channel is provided by a receiving sleeve (4) which runs through the ball (3). Tennis training device according to one of the preceding claims, characterized in that the receiving sleeve (4) protrudes from the ball (3) at its end and has end faces at its ends for abutting against the abutment elements (5, 6). Tennis training device according to one of the preceding claims, characterized in that the distance between the stop surfaces (9) of the two stop elements (5, 6) is 112-135%, particularly preferably 115-125%, based on the diameter of the ball (3). . Tennis training device according to one of the preceding claims, characterized in that the strength of the stop elements (5, 6) along the longitudinal axis (11) of the rod (2) is 8-15%, preferably 10-14%, based on the diameter of the ball (3rd ), amounts to. Tennis training device according to one of the preceding claims, characterized in that the length of the receiving sleeve (4) is 101-109%, preferably 104-108%, based on the diameter of the ball (3). Tennis training device according to one of the preceding claims, characterized in that the radial play of the receiving sleeve (4) relative to the rod (2) is less than 5 mm, preferably between 0.05 and 0.35 mm, particularly preferably between 0.1 and 0.25 mm. Tennis training device according to one of the preceding claims, characterized in that the outer diameter of the annular stop surface (9) of the receiving sleeve (4) is less than 50% of the diameter of the ball (3), preferably 25-30%, based on the diameter of the ball (3 ), amounts to. Tennis training device according to one of the preceding claims, characterized in that the rod (2) has a grip area (7) with a casing, in particular a polymer and/or rubber casing (8). Tennis training device according to one of the preceding claims, characterized in that the polymer and/or rubber casing (8) has a thickness of between 0.2 and 1.5 mm. Tennis training device according to one of the preceding claims, characterized in that the receiving sleeve (4) and/or at least one of the stop elements (5, 6) has at least one rounded or chamfered edge (10), in particular in the configuration as a peripheral edge (10). . Tennis training device according to one of the preceding claims, characterized in that the receiving sleeve (4) and/or the stop elements (5, 6) are made of plastic, in particular of POM and/or PVC.

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